A Newcastle based aircraft went tech this afternoon - I think it was G-CELA. Whichever a/c it was, it was due to operate the LS583 to ALC. The closest spare was in LBA, and was brought up to operate the sector.
UPDATE: The tech a/c was in fact G-CELA, conducting air tests right now -
15:40UTC 05/10/2015
G-CELI operated LBA-NCL-ALC, arriving in ALC 22:50LT - or 3 hours late
However, to avoid delays on the return sector, ALC airspare G-CELS flew the ALC-NCL sector - arriving 25mins ahead of schedule at 22:15LT.
Made for strange viewing on FR24. Currently, G-CELS is returning to ALC as
EXS45A, whilst G-CELI is returning LBA as
EXS044A. Looks something like this:
Image Courtesy of FR24