Yes, its called rent-a-roof and it was touted to private home owners about three years ago to reduce costs. It wasn't very popular as it could make selling the house tricky as the lease arrangement for the roof space had to be transferred to the new owner. As the feed-in tariff has decreased in value, the scheme has become less attractive to those promoting it.
However, it does make more sense for rented properties where ownership might be for a longer period of time, particularly if the owner is the council. In your case it sounds like a company looking to economise on scale, but it may be that the reduction in FiT has rendered it uneconomic for them, or perhaps some private landlords didn't agree.