As what tmmorris said. You can't request anything from an AG, only tell them what you are doing and see if they tell you anything. You can ask anything you want like other known traffic but different aerodromes will offer different levels of helpfulness, if indeed any response - they don't have to. Once or twice I bothered to contact Stapleford then re-establish contact with Stapleford but as Peter said in one of the original replies, what can they officially tell you?
I fly the track between Stapleford and LCY a lot, and with farnborough I either tell them I'm routing around the south, or they will figure it out anyhow. If you don't have a GPS, make sure you have positively identified Stapleford and are sufficiently south enough to not be in their zone, but not so far south you've busted LCY.