Gaia house offers retreats in different meditative disciplines from the Buddhist traditions.
London Insight Meditation offers day retreats, workshops, courses and more.
Dharma Seed offers free downloadable Dharma talks.
Sanghaseva offers opportunities for socially-engaged Buddhism.
Oxford Gaia House run day-long retreats.
Freely Given Retreats offer weeklong and daylong retreats for no charge, instead inviting you to donate what you can
The Sharpham Trust in Devon, provides opportunities for meditation, yoga, and shorter retreats.
The Satipanya Buddhist Trust run retreats in Powys, Wales, in the Mahasi tradition of Theravadan Buddhism.