- Lancashire Constabulary
- Lancashire County Council
- Lancashire Partnership for Road Safety
- Leeds City Council
- Leicester City Council
- Leicestershire Constabulary
- Leicestershire County Council
- Lightmare
- Limerick City Council
- Limerick County Council
- Lincolnshire County Council
- Lincolnshire Fire & Rescue
- Lincolnshire Police
- Lincolnshire Road Safety Partnership
- Liverpool City Council
- Living Streets
- Local Transport Projects Ltd
- London Borough of Barking & Dagenham
- London Borough of Bexley
- London Borough of Brent
- London Borough of Bromley
- London Borough of Camden
- London Borough of Croydon
- London Borough of Enfield
- London Borough of Greenwich
- London Borough of Hackney
- London Borough of Haringey
- London Borough of Hillingdon
- London Borough of Hounslow
- London Borough of Islington
- London Borough of Lambeth
- London Borough of Lewisham
- London Borough of Merton
- London Borough of Newham
- London Borough of Redbridge
- London Borough of Richmond upon Thames
- London Borough of Southwark
- London Borough of Sutton
- London Borough of Tower Hamlets
- London Borough of Waltham Forest
- London Cycling Campaign
- London European Partnership for Transport (LEPT)
- London Road Safety Council
- Loughborough University (Transport Safety Research Centre)
- LPDT
- Luton Borough Council
- M Partnership
- Manchester City Council
- Mayo County Council
- MCIA
- Meath County Council
- Medway Council
- Merseyside Road Safety Partnership
- Merthyr Tydfil County Borough Council
- Metropolitan Police Service
- Mid & West Wales Fire & Rescue Service
- Middlesbrough Council
- Midlothian Council
- Milton Keynes Council
- Minimise Your Risk
- MOD (Ministry of Defence) St Athan
- Modeshift
- Monaghan County Council
- Moray Council
- Motor Insurers’ Bureau (MIB)
- Motorcycle Action Group
- MRSS
- National Express
- National Police Chiefs’ Council (NPCC)
- National Transport Commission
- National Young Rider Forum (NYRF)
- Neath Port Talbot County Borough Council
- Newcastle City Council
- Newcastle University (School of Civil Engineering and Geosciences)
- NHS Bristol
- Norfolk County Council
- Norfolk Fire and Rescue Service
- North Ayrshire Council
- North East Lincolnshire Council
- North East Regional Road Safety Resource
- North Lanarkshire Council
- North Lincolnshire Council
- North Somerset Council
- North Wales Road Safety Group
- North West Federation of Driving Instructors
- Northern Constabulary
- Northern Safety Camera Partnership
- Northumberland County Council
- Nottingham City Council
- Nottinghamshire County Council
- Nottinghamshire Police
- Novo 55 Consulting Ltd
