I experienced the same kind of delay at AGP last February with JMC. All the other flights leaving AGP on time, but JMC delayed. The reason was that the aircraft which had been scheduled to operate the flight had been hit be a catering truck so they had to position an aircraft from BHX to LGW.
JMC and Airtours have nothing to do with each other but I expect Airtours had purchased a few seats on the JMC a/c for the summer.
Other reasons JMC may have been delayed is the a/c may have been stuck down route earlier in the day or days and they are trying to catch up.
But the begining of May is the start of the Summer season so there tends to be a few changes to operators and a/c type.
[This message has been edited by euroboy (edited 31 May 2001).]