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James Ageros KC

Call 1990 • KC 2015

"Jim Ageros KC is very user-friendly, good with clients and good in court."
(Chambers UK 2016)

Criminal Regulatory & Environmental

James’s health & safety practice involves a mixture of defence and prosecution, court and advisory work. Over the past decade he has represented a number of companies, public authorities and individuals in cases involving fatalities in the workplace. He also does a large amount of inquest work and enforcement notice appeals. On the prosecution side, he has regularly appeared in cases of the upmost complexity and seriousness. His clients include, construction companies, local and county councils, hotel chains, hospitals, rail infrastructure providers, care homes and a variety of other businesses in different sectors.

His environmental work includes prosecutions in respect of the large-scale disposal of controlled waste.

A greatly experienced, jury savvy and technically astute health and safety and regulatory silk. Consistently rated in the top tier of practitioners in the field. Author of most widely used practitioners’ text book.

Areas of expertise include: construction, demolition, work at height, traffic management, asbestos, railways, medical devices, clinical failings, recreational and professional diving, machine guarding, gas appliances, electrical contracting, swimming pool and water course accidents.

Selected Cases

  • Grenfell Tower Inquiry; represented the Tenant Management Organisation (TMO) in the GTI from the date of the Fire in 2017.
  • R v Leivers and others: manslaughter by gross negligence; represented the director of an animal feed company in a trial which concerned the deaths of two employees
  • R v Hall and Others: represented the managing director of a company charged with gross negligence manslaughter of an employee, crushed by a robot arm on a packing line.
  • R v Hawkeswood Metal Recycling Ltd; represented a company charged with breaching health and safety duties resulting in the death of 5 employees killed by the collapse of heavy bay wall
  • MCA v Svitzer Marine Ltd: represented large marine tug operating company in connection with the death of a ship’s engineer who died when he fell into the Mersey estuary;
  • R v Intrada Shipping Management Ltd: represented shipping operator in connection with collision of two vessels off the coast of Sweden;
  • MCA v Port of London Authority, Goatham and others; defended tug master charged with breaching marine health and safety duties in connection with fatality of crew member when tug overturned when towing on the Thames;
  • R v Erith Plant Ltd: represented large construction company charged with offences arising out of the death of an employee killed during a loading operation;
  • R v United Living South Ltd: represented very large housing infrastructure and service provider in connection with gas explosion at residential property;
  • R v Better Leisure Ltd; defended national leisure centre operator in connection with the death of a swimmer at a London pool;
  • R v Kuhlman; represented managing director of a heritage construction company charged with health and safety offences following the death of a worker in a dumper-overturning accident;
  • R v Luton Borough Council; represented local authority in connection with assault by pupil on a teacher at state secondary school.
  • R v Balfour Beatty Engineering Services Ltd & Mark King – Defence of Contracts Manager charged in connection with fatality during electrical upgrade at data centre.
  • R v Rolls Royce Marine Power Operations Ltd – Defence of Rolls Royce division in joint prosecution by EA and HSE in connection with loss of radioactive source tip and subsequent exposure of workers to excessive radiation.
  • R v David Lloyd Leisure Ltd – Defence of large leisure group in connection with serious accident to gym attendee leading to loss of an eye.
  • R v St Edmundsbury Borough Council – Defence of local council charged with health and safety offences resulting from fatality at summer fair when fairgoer trampled to death by runaway horse and cart.
  • R v Norfolk County Council – Defence of County Council at Crown Court trial relating to teenager drowning in Norfolk Broad.
  • R v Adrian Maund – Defence of signaller charged with health and safety offences arising out of fatality at level crossing.
  • R v AMEC PLC & Another – Defence of multi-national company in Crown Court trial connected with fatality during construction project in Manchester.
  • R v Leadbitter PLC – Defence of Principal Contractor at trial concerned with near fatality on construction site.
  • R v Chris Hazel – Defended partner in shotblasting firm charged with guarding offences resulting in serious injuries to employee.
  • R v Jilbert & Another – Successfully defended gas fitter charged with manslaughter by gross negligence.
  • R v Huntley Mount Engineering Ltd & 3 Others – Represented supervisor of engineering company charged with manslaughter of young apprentice.
  • R v Alan Wilkinson & 2 Others – Defended boss of demolition company charged with HSWA offences in connection with death of worker in plant accident. Defendant acquitted.
  • R v Balfour Beatty Rail Maintenance & Others – The Hatfield Derailment. Acted on behalf of the infrastructure contractor in contested trial for corporate manslaughter.
  • R v Jiffy Packaging Ltd – Defence of company charged with offences in connection with serious guarding accident.
  • R v W Carroll & Sons Ltd – Defence of roofing company charged with offences relating to serious injuries following fall from height.
  • R v Roy Kennet & Another – Instructed on behalf of defendant in the Tebay rail disaster – prosecution for manslaughter of four track workers killed by runaway engineering trailer in Tebay, Cumbria.
  • R v TAV Engineering – Represented company charged with offences arising out of the Buncefield explosion.
  • R v North Staffordshire NHS Trust – Instructed on behalf of NHS Trust at inquest and in subsequent prosecution concerning death of a patient undergoing brain surgery.
  • R v The Concrete Company Ltd – Represented managing director of company charged with manslaughter by gross negligence.
  • R v UK GSE Ltd – Instructed on behalf of large multi-national construction company in case relating to the manslaughter of a construction worker on construction site.
  • R v PK & IF Cobley Ltd – Defended company charged with offences relating to serious injuries from work at height.
  • R v Nigel Band – Appeared for diving instructor charged with health and safety offences in relation to the death of a diver under his care.
  • R v Amber Engineering Ltd – Represented large waste reprocessing company in connection with proceedings relating to the death of a worker at the Company’s site.
  • R v London Central Bus Company – Acted on behalf of major London Bus Company in connection with two prosecutions resulting from a death and serious injury at Central London bus depot.
  • R V Exel UK Ltd – Appeared on behalf of worldwide distribution company in two separate cases connected with injuries at distribution depots.
  • R v Knight Frank & Others – Acting for contract manager in multi-party construction site fatality resulting from fall from height.
  • R v Morecare Homes Ltd – Appeared for defendant care home in prosecution concerning death of a patient through asphyxiation.
  • R v PDBL Ltd – Appeared for steel erecting company in prosecution concerning death of a steel erector on multi-party construction site.
  • R v Sunjet Security Ltd – Appeared for Defendant Company in respect of asphyxiation of security guard through carbon monoxide poisoning while at work.
  • R v Prysmian Cables & Systems Ltd – Represented manufacturer of oil-filled cables in prosecution relating to injuries occasioned by contact with corrosive substances.
  • R v Mick Barker & Another – Represented fairground inspector charged with failures connected with the collapse of a waltzer ride.
  • R v Kaltenbach UK Ltd – Represented large UK division of German Manufacturing Company in Crown Court proceedings in connection with prosecution brought following crush injuries to employee.
  • R v Royal Berkshire NHS Foundation Trust – Represented NHS Trust in case connected with fatal fall of elderly patient from poorly maintained and designed trolley.
  • R v Paul Jukes & 3 Others – Defence of contracts manager charged in connection with fatality of worker at recycling plant.
  • R v Aramex Ltd – Defence of multinational spedition company charged in connection with fatal fall from height at company premises.
  • R v Jarvis Construction Ltd – Appeared for Defendant Company in prosecution concerning death on a construction site.
  • R v McDonalds PLC – Appeared for worldwide fast food chain in connection with accident in kitchen.
  • R v Marriot Hotels PLC – Represented hotel chain in connection with injury in kitchen.

Prosecution Cases

  • Reading Borough Council v Arcadia Group Ltd and others: prosecuted Arcadia and Top Shop in connection with death of a child in a store in Reading;
  • R v Temple Lifts Ltd – Prosecuted lift engineering company in connection with catastrophic lift failure at Tower Bridge London that resulted in a number of tourists suffering broken limbs.
  • R v Laing O’Rourke PLC & Another – Prosecuting major construction company in relation to fatality during the construction of Heathrow Terminal 5.
  • R v Eastbourne Buses Ltd – Prosecuted company in connection with death of employee at depot.
  • R V Team Waste Ltd & Others – Represented HSE in prosecution in Crown Court connected with fatality in Brighton Town Centre.
  • R v Wood, Wood and Scott’s of Whittington Ltd – Prosecuted gross negligence manslaughter trial concerning fall from height.
  • R v Tom Dunn and 7 others – Prosecuted largest ever case brought by Environment Agency in South West of England.
  • R v WD Bennett’s and Eurolift – Prosecuted both companies in double fatality tower crane collapse during construction of special school in West Sussex.
  • R v Veolia & Others – Prosecuting major refuse Collection Company relating to the death of a recycling operative.
  • R v Network Rail PLC & Another – Appeared as prosecution counsel in first contested trial conducted by the Office of the Rail Regulator.
  • R v BAE Systems Ltd & Others – Appeared for prosecution in respect of death of off-shore worker during renovation of a North Sea platform.
  • R v Npower PLC – Prosecuting utility company in relation to accident during upgrade at plant.
  • R v Eco Oil Ltd & Another – Prosecuted oil storage company in connection with large fire and explosion at depot in Kent.
  • R v PC Harrington Ltd & Another – Prosecuted two companies in relation to fatality during construction of new Wembley Stadium.
  • R v Ward & Two Others – Prosecuted 3 individuals concerned with double fatality gas explosion at residential village in Surrey.
  • R v AMEC & Network Rail – Appeared for the prosecution in relation to the West Sutton Derailment; derailment of commuter train due to gauge spread through failing lock spikes.
  • R v Lionverge Ltd & Another – Prosecuted case involving unsafe maintenance practices on the Midland Mainline.
  • R v Nestle UK Ltd – Prosecuted major food producer in contested jury trial relation to the electrocution of employee.
  • R V Canary Wharf Contractors Ltd & Others – Appeared for Prosecution in multi party CDM case concerning death on construction site during the construction of Canary Wharf.
  • R v LUL & Elkington – Successfully prosecuted underground network and renegade employee (‘Dangerous Dave Elkington’) in long Crown Court Trial.
  • R v Imperial College – Appeared for prosecution in respect of allegation that the defendant propagated the HIV virus in unsafe laboratory conditions.
  • R v Cherren III & Others – Prosecuted Development Company and individuals in connection with fatality concerning fall from height in commercial renovation.
  • R v Wheeler & Wheeler – Appeared for prosecution for manslaughter of landlords charged in connection with death by carbon monoxide poisoning.
  • R v LUL – Appeared for Prosecution in respect of asphyxiation of security guard through carbon monoxide poisoning while at work.
  • R v Kent County Council and Others – Acted on behalf of prosecution in respect of fatality on major road due to badly positioned construction plant.
  • R v Harris Calnan & Another – Prosecuted double handed fatality at CCC. Resulted in plea.
View full profile »


‘Just seems to get stronger and stronger. Possibly the calmest lawyer on the circuit, perfect for difficult clients and difficult tribunals. Brings a logical approach and defuses situations with charm.‘

Legal 500, 2024

“His drafting skills are fantastic, but his key strength is his advocacy – he is a very strong barrister.”

Chambers & Partners, 2022

“Excellent with clients from individuals to large corporates with empathy and understanding of the case and wider issues..”

Legal 500, 2022

“An unassuming, modest silk. Very relaxed but confident with complex cases and clients. Gets a quick grip on the issues and impresses clients. Jurors like him.”

Legal 500, 2021

“He’s a go-to barrister for the heavyweight work; he’s excellent in terms of how he deals with clients and has a great presence in court.”; “He is a superb jury advocate and an excellent barrister.”; “His technical grasp of detail is very, very strong.”

Chambers & Partners, 2021

“Highly experienced, awesome with the jury and really fights for his clients.”

Chambers & Partners, 2020

“Jim Ageros KC is very user-friendly, good with clients and good in court” ; “he’s a very decent, straightforward prosecutor. He’s always very impressive.”

Chambers & Partners, 2016

“It’s spectacular to watch the legal arguments he puts together” ; “he is a very smooth, charming and effective advocate.

Chambers & Partners, 2015

“He has an in-depth knowledge of the law.”

Legal 500, 2014

“James Ageros successfully splits his time between prosecuting and defending. A well-known expert in the area, he has co-authored a leading book on health and safety. Sources praise his technical brilliance and “supreme understanding of the law – he cuts straight through to the crux of the matter, however complex the facts.” Recently, he acted for Norfolk County Council in defending a prosecution brought against it by the HSE following the drowning of a teenager in a Norfolk broad.

Chambers & Partners, 2013

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