Can you find out if your boss was a member of the British Institute of Inkeeping (BIIAB)...?
They can give advice and support for any legal situations....
It looks like he/she was being charged over the top rates and barrelage by the brewery, and subsequently got into debt - it happens all too often when a lease is involved, that's one of the reasons why so many pubs are closing....
The chances are that your boss will not have the means to provide redundancy pay ( depending on if you had a contract with them or not), but the next leaseholder of the business may continue to employ you (depending on the brewery's terms)....
Best thing to do is ask your boss for a written termination, and follow the previous advice given by factor30 and Maidup.....
It's a very grey area... good luck......