Steve - I would black out ur letters better - u can still see ur name...

If they were your agents and collecting the monies on your behalf I think that they are s'posed to keep it "on trust" for you. Ie, you would get first dibs on the money rather than having it shared out to all the creditors. I would definitely write to the insolvency practicioner (if there is one) to stake your claim.

If they were taking money when they knew they were going insolvent then I think this is "wrongful trading". You need to check the insolvency act and the offences a director can be personnally accountable for.

I dont know about debts but they definitely send some of there stuff to outside lawyers