MORTGAGE ON AN OFFICE CONVERSION

wiseoldbird77

I am selling my flat through an estate agent to downsize. It is a great flat that has attracted loads of viewings and is on the top two floors of an office conversion done in the 1970s. We got a buyer for whom the broker attached to the agent has been trying to get a mortgage. Unfortunately the buyer had put that it is ex-local authority on the forms submitted to 3 mainstream banks who all turned him down.
When I found out this had happened I immediately got on to the agent and reminded them I had told them at the beginning it is a converted office of a large publishing company and is well built. I suggested several lenders I'd looked up on the web who would be more likely to help. I'm told the buyer has been on holiday but he did say in an email that he would try again. The broker has said he is still keen to go ahead. I am waiting to see what's happening.
Has anyone else had a similar experience who can suggest anything to help. Do you know of a lender (mainstream or otherwise) more likely to lend that you could suggest.

ACG

Im a bit confused. 
Is the problem that the broker messed up? In which case you have spoken to the broker and that should fix the problem or is it that it is ex local authority? Although I dont see how if it was a commercial building. 

I dont understand how there is a problem as both of these can be overcome so im not quite sure where the problem is. 

Hoenir

Buyer's been away. Probably accounts for the lack of progress.