The Easy web site today states due to the on going air traffic controllers strike (not specified where) there are disruptions.
Looking at the easy departure checker it is currently showing 50 cancellations accross the network for today.
Looking at the RYR web site, several flights are delayed but none are showing as cancelled.
BA show 1 flight from LHR & 1 flight from LGW cancelled.
So, where is this disruptive ATC strike today causing this trouble ? (but not to BA or RYR). A little more information would be helpful in understanding why the flights are cancelled.