I'm sitting in the (nicely-appointed) IB Dali lounge at MAD, and have been since about 11am, attempting to fly to VLC. The 12:35pm flight I was booked on was cancelled for unspecified reasons, and now the boards are showing just about every single IB flight is delayed by half an hour (and occasionally cancelled) due to 'Change of programmed aircraft', 'Aircraft rotation' or 'Crew rotation'. The departure times are also fluid though, the 4:10pm flight I'm now booked on is listed as departing at 5:06pm and travelling upwards. Anyone know what's going on?

Interestingly, I was offered a bus ride to Valencia when my first flight was cancelled, perhaps it might have been a wise option after all ...