I use Thomas Higgins in Liverpool. Just google the name.
See my previous post on this, they send a 'Letter Before Action' it will cost about £2.80 it seems to scare the cr@p out of them, in nearly 20 years of this they have never failed me.
They are easy to talk and very helpful, they give you a password that you can use in future, its all done on line, I hadnt used them for 8 years or so, got my £350 or so straight away.
Dont know why they are based in Liverpool, perhaps its all the scallies up there (oops wheres my tin hat).
Murky