It's a sad place these days Greenham (from an aviation perspective) although very popular as a place for a wander, bike ride, dog walk or horse ride these days.
If you had taken a wander around FL you would have found that the Cruise Missile site on the SW corner of the airfield is still pretty much intact (and is likely to stay that way, as far as I know) although a bit dilapidated, and the centre intersection of the runway has been retained.
Not so long ago on a ride around the site, I easily found the former location of the PAPI's at the eastern end of the runway, 4 sets of thick black cables sticking out of the ground, looking like the units they used to feed had only just been ripped out.
Thought-provoking to think that the place could have been the answer to the much talked about shortage of runway capacity in the SE of England (with a motorway, trunk roads and a main line railway all within fairly close proximity).