There are numerous Restricted Areas (Temporary) currently being notified this summer, including around the RAF Centenary flypast, Fairford, Farnborough, a Presidential visit, and the usual air displays including by the Red Arrows.
All pilots must check NOTAMs before flight.
For advance details of restrictions of flying, please refer to the NATS published AICs
A common error is mixing or miscalculating the difference between UTC and local time. Please check timings very carefully.