Our Airport site office was the first floor of the building directly above TA4 in Epsom Square on that map.
BA used to park their 747s nose in at TA4. Being on the first floor, you could open the window and fell like you could stretch and touch them at cockpit level, such was the close proximity.
T'was a noisy place to work, being near the threshold. Never got used to it and it was constant.
I recall a rare Concorde easterly departure off the northern runway that shook our building to the point our fillings fell out along with the windows. There used to be a greasy spoon van round the corner on the Eastern Perimeter Rd who served the best bacon butties ever.
Happy memories.