Question Author
Thaks Miss Boots - they are so obvious when you get the answers!
Happy to help with yours:
AB - Ahhh Bisto.
DBVAFH - Dont be vague, ask for Haig
HIACCH - Happiness is a cigar called Hamlet
YCBSOS - You can be sure of shell
YNAWAS - Your never alone with a Strand
Any idea on my other two - OABBB and BHBE ?