Gill - a friend of mine BOUGHT a flat (England), and, as you know, flats are leasehold - and included in the terms of the lease agreement was restricting the owner in 'religious gatherings' (from what I recall, no more than eight or ten members could attend a religious meeting at property).
Perhaps freeholders are tightening up on gatherings? I wonder what the terms of council properties are (a lot of the JWs I know tend to be 'council')?