The Counting House (2nd floor), 53 Tooley Street, London, SE1 2QN
London Bridge Office
Opposite the new Tooley Street (side) exit of London Bridge Station.
From any platform, go down the stairs to the new lower concourse. Head towards the river, i.e. go towards the escalators leading to platform 1. Go out of the Tooley Street exit of the station. You'll be opposite the Hays Galleria building, looking, more or less, into the covered lane in the photo. The red post box in the photo is no longer there. Go into the Galleria and you'll see a revolving door on the left, ahead of you (see arrow in the photo). This is the entrance to The Counting House. Sign in and take the lift to Anthony Gold's offices on the second floor.
There are literally hundreds of trains to London Bridge from the South and the East.
The following buses all stop in or near Tooley Street: 17, 21, 35, 40, 43, 47, 48, 133, 141, 149, 343, 381, 521, RV1.
There are frequent underground services to London Bridge station directly on the Jubilee and Northern lines. The office is 6-7 minutes on foot from Bank / Monument stations on the District, Circle lines, the Waterloo and City line and the DLR.