I came across https://allia.org.uk/ a couple of months ago.
They run a co-working space in Hackney, and their remit is for start-ups, and existing business based in East London.
When i spoke with their staff, they said that they were open to the idea of supporting Co-operatives as a business model.
They’re also one of the few incubators that don’t require any equity from the organisations that they support.
They’re currently open for applications. Application form here, https://www.f6s.com/seriousimpacteastlondonincubator18/apply and they have an open day where you can talk directly with their staff on the 2nd of May.
Tickets available here, https://www.eventbrite.co.uk/e/serious-impact-incubator-discovery-session-tickets-45472072192