London council arts officers
Many London borough councils own multiple business properties that are not in use, and some will lend or lease these to artists for exhibitions or projects.
A good first point of contact in developing these kinds of partnerships is through the arts officer of the borough in which you live, work, or are planning your project.
As well as council properties, arts officers can often refer artists to non-traditional venues, sympathetic local developers or companies, local communities with which to collaborate, and seed funding. Arts officers often have an ongoing working relationship with local planners, so can also advise artists planning temporary public commissions or events.
An updated contact list, with names, of London Borough Arts Officers can be found on the NALGAO website.