England
Bristol Ch`an Group, Bristol: Dogen Sangha Buddhist Centre, England: List of Zen Centres, Guilford: Modern Zen Network, Harrow Zazenkai, Hexham: Throssel Hole Buddhist Abbey, London: International Zen Association, Manchester Chan Group, Monkton Wyld Court: Meditation Retreats, Preston: Serene Reflection Meditation Group
Scotland
Aberdeen Serene Reflection Meditation Group, Edinburgh: Portobello Buddhist Priory, Glasgow Zen Group, Zen Centres in Scotland
AZI Dojos in the UK
In French it is called the Association Zen Internationale. The AZI is part of the Soto Zen school.
The Western Ch'an Fellowship
Zen practice based on the tradition of Ch'an Master Sheng Yen. Lists several affiliated meditation groups around the UK.
UK Community of Interbeing
The organisation supporting the teachings and mindfulness practice of Thich Nhat Hanh in the UK. Information about the organization and its sanghas in N. Yorks, Wakefield, Wales, Birmingham, Northants, Norfolk, Cambridge, Wiltshire, Oxford, Devon, Bristol, Hants, Scotland, Lancs, Sussex, Kent, North and Kensington, South East and Dulwich, and Central, South West, and East London.