I normally use the bridge near Hatton Cross for spotting (registration-collecting) reasons. It might be OK
for photography. A better option would be a field near Hatton Cross. I don't know the exact directions (even though I've been there before), but UTA or someone else can help you.
If the planes are landing on 27R, go to the BA
maintainence area. It's simple to get there: go to Hatton Cross and then walk for about 10 minutes. There might be a bus from the central bus station, but I normally use the tube and then my feet.
"Everyone writing for the Telegraph knows that the way to grab eyeballs is with Ryanair and/or sex."