easyJet have cancelled hundreds of flights this summer due to crew shortages. There has been much discussion about it on PPRuNe.
I was informed my flights BRS-EDI-BRS in June were cancelled (for 'operational reasons') via email about two weeks beforehand. I was given the option to cancel and be reimbursed my fare or seek an alternative date.
When I tried the latter I found that numerous other BRS-EDI-BRS flights had been cancelled in June, along with other routes as well, so I elected to have my money returned.
Since then easyJet has cancelled many more flights from BRS (and indeed form elsewhere), on various routes, and I have noticed that the Thursday BRS-Rome (CIA) rotation has been a regular victim.