I recently came across this webcam at London Heathrow, which seems to take a shot of every aircraft as it passes. Quite useful for those into desktop spotting 
Airport Spotting Guides Europe Book
The new book by the author of this blog covers 35 of Europe's best airports for spotting.
Each guide includes a map, spotting locations, technical information, contact details, list of airlines, list of aircraft stored/preserved/wrecked at each airport, and details of the best hotels and rooms to stay in.
Does anyone know whether there are any internet sites using live moving video cameras (as opposed to webcams) trained onto aircraft landing at Heathrow or Manchester that you can log into. Thanks.