Again thank you for waiting this was really difficult due to the high quality cluepersonship shown as ever.
A lot of musical clues intentionally or not even Back Door a jazz rock fusion and Paul I had got it by then.
When Mattrom entered the first clue I knew it was going to be difficult. Other favourites were Seamus 16, Sw 24 and Ginge 33. I've finally gone for Bbm @ 30
Checkpoint Charlie occupies part of drab look structure
Here's your prize
http://youtu.be/HhSoJwGKj7E