G-EZFT was already at Southend and had no flights planned today (due 2nd Southend line of flying beginning tomorrow) so positioned empty to LGW to operate extra flight LGW-BCN for disrupted passengers and then operated BCN-SEN flight again with disrupted passengers as that's where the plane would be flying from on Thursday. It was never due to or planned to operate into LGW or divert from LGW.
Good job by all to assist Lon-BCN-Lon passengers disrupted by the French ATC strikes