What is causing travel chaos at some UK airports and what are your rights?

With some airlines struggling to cope with the half-term holidays, what should you do if your plans are disrupted?

Holidaymakers have seized the opportunity of school half-term holidays and the Queen's platinum jubilee bank holidays to take long-awaited trips abroad, but many have met with long queues at airports and cancelled flights. So what is going on, and what can those who've had their plans disrupted do?