Munnyspinner
Are you sure your colleague was flying with BA to GVA?
I've checked..... of the 8 flights to GVA from LHR yesterday (23rd March) only one arrived late. It departed 15min late due to the aircraft arriving in late from its previous flight. BA.com correctly indicates that it was 15min late on departure.
The only other delay was a 3 minute delay due to ground congestion at the terminal - but it was 12 mins early at the terminal in GVA.
P.S. The CAA says that a departure within 15min of Schedule is "ontime" for their stats.
Note to self: Stop feeding the troll!