Last years frequencies, probably the same this year (It's AM not FM, and Mhz not Khz) but if it's an air band receiver it'll be fine. the higher freqs are the military ones so you may not hear the mil stuff talking to the tower.
Fairford Director 1: 123.550 & 241.825
Fairford Director 2: 134.550 & 339.850
Fairford Tower: 130.675 & 338.225 (also display freqs)
Fairford Ground: 119.150 & 234.250
Fairford Delivery: 124.550 (Monday only for clearances)
Weather: Brize ATIS 259.0