Liability Finch is an ex-grifter that has become a thief. However, he is a bumbling, hapless crook hence the name and is just not cut out to be a crook. He first appeared in "The Thieving Mistake".
He considers Mickey Bricks to be grifting royalty and wonders what it would be like to work beside him every day and used to work with Ash Morgan back in the mid-80s working short cons until Ash saw sense.
They once did the pigeon drop six times in one day down in Brighton but there last victim was an off-duty policewoman and they did time. He also helped Ash with the flop where Ash would perform the flop and then Finch would pretend to be a doctor passing by. He now lives in a council flat in London.