Spotters Guide to Glasgow Airport

I keep getting requests asking where the best places to spot aircraft are at Glasgow Airport (EGPF). I've used google maps to point out where they are and how roughly to get to them. Glasgow Airport has one long runway and depending upon the wind direction 23 or 05 are the runway designation. (23 = 230 degrees from north, 05 = 50 degrees from north) Obviously which runway is in use and the time of day (where is the sun!) are the 2 biggest factors in deciding which spot to chose.