Looks like the flight was a 'maintainance flight'?
Just for the record.
16:43 11/01/09
ACARS mode: 1 Aircraft reg: G-JMAA [Boeing B753]
Message label: ** Block id: @ Msg no: 120f
Flight id: MT753M [] [Thomas Cook]
Message content:-
SBS-1 Callsign: TCX753M