Heathrow
Surely the best place to spot at Heathrow is from the Thistle hotel.
Their bar terrace around the back has great views of 09L, pull up a beer and enjoy the sun, with the smell of Jet A1 and noise of GE90s!! Oh I'm in heaven!
Me and my son have spent many a day there in the summers.
Happy Spotting Guys
OMAA