RAF F-35Bs fly over London during the RAF 100 Flypast event.
According to the RAF:
On 1 April 2018, the Royal Air Force celebrated its 100th birthday. To mark this occasion, we reflected on our history and our achievements. We also celebrated the work the RAF is currently doing and look forward to the next 100 years.
The centenary itself has been marked by special events, activities and other initiatives at local, regional and national levels running from April to the end of September 2018.