this help at all?
I work just round there corner so get there for 6.30 ish. If you really dont know london then pm me for my mobile number as its far easier to lead you in than try to explain in any usefull or meaningfull way.
If you can remove your plate, better if not then just a neck tube/carrier bag/ jacket will do the trick.
Oh, mines a latte with brown sugar btw, virgin.
Please