The Renaissance Hotel does offer spotting deals whereyou get an upper floor room overlooking runway 27R-09L. BUT....it's only any good for photography in the late afternoon/early evening and then only if landings are on 27R. Landings on 09L will have turned off before they get to the hotel area. You can get shots of aircraft across the runway as they taxi past terminal 2. Best lens 70-300.
For 27R landings the most popular place is Myrtle Avenue across the road from Hatton Cross station. Here there is a large parkland area for side on and threequarter front shots. Best lens range between 18 - 200mm. Parking is not to easy as the residents have become rather anal about their frontages being blocked. They haven't yet caught on theat if you aprk by a raised kerb then that is not park of their house access. However, it's not worth winding them up as some of them really are less than pleasant and likely to become physically aggressive.
27L takeoffs. best palce is the Esso garage on the Southern Perimeter Road. Toilets, food and parking most of the time but you are competing with taxi drivers who seem to think it their God given right to be there over all others. If you park here buy a drink and sandwich to keep the garage staff sweet although I have never had any problem with them.
09L landings. Next to the Stanwell Moor Road is a field with the approach lights in it. If you park here park well off the pavement and allow pedestrian access along the footpath. Do this and you won't have any police problems. Alternatively, just before this location you can park under the flyover, hop over the wooden fence and climb a slope up to the roadway. This will put some 50 feet higher up but DO
NOT SIT ON
THE CRASH BARRIERS ALONGSIDE THE ROAD. This is still the M25 motorway and the police WILL move you on. Sit on the grass 15 feet or so down from the barriers where you can't be seen from the road. Best lens 70-300.
Landing runways alternate between 27L and 27R and change over at 1500 hrs each day. That's when the wind is from the East. With westerlies the landing runway is always 09L with the occasional rare 09R landing. 09R is so rare for landings that it's niot worth waiting down that end and I don't know a useable spot anyway.
Here's a link to the definitive Heathrow Spotters Guide.... http://www.plane-mad.com/airport-spo...gdom/london-heathrow-lhr-egll.html
Click on the runway alternation link to get the runway schedule.
Hope this helps.