Its taken me about 20 seconds to find the relevant notam from AIS:
EGTT/QWBLW/IV/M/AW/000/045/5228N00015W002
FROM: 08/08/28 11:00 TO: 08/08/30 19:30
E) AIR DISPLAY/AEROBATICS CONTEST WI 2NM RADIUS 5228N 00015W
(PETERBOROUGH/CONINGTON AD, CAMBS). AUS 08-08-0020/AS2LOWER: SFC
UPPER: 4100FT AMSL
SCHEDULE: 28 AUG 1100-1930, 29 30 AUG 0800-1930
Not rocket science at all