Or you could just fly into Damyns Hall (EGML) (inside the M25 close to the QE2 Bridge) its free landings and fuel is £1.80 and talk to the award wining Deepac (resident instructor there) and he will talk you through flying that bit of airspace to view the dome etc.
PS, singles banned at City not strictly true, I flew a single in and out of there last year
