go careful of westcot as they are particularly nasty foden
let them know in a letter what you are currently in the process of doing,
and state that you are awaiting halifax's reply.
avoid telephone conversations with them as they have a knack of getting people to agree to things that they wouldn't of normally
and then as if by magic losing the recording of the call.
so that you can't dispute anything that happened with the phone call.
tread carefully as these guys dont pull the punches they land them in the gut.