According to flightwise.com, there was a 757 belonging to 'UNITED AIR EXPRESS LIMITED' arriving in earlier about that time, however it's not listed on the departures. Maybe it?
Timestamp 10/26/2009 9:37:38 AM
Ident/FlightID AEU747
Status FILED
Facility ETMS
Equipment Prefix
Type B752 (Boeing 757-200)
Equipment Code Q (unknown)
ProposedDepTime 01:40 PM GMT
ActualDeptTime N/A
ETA 02:28 PM GMT
ActualArrTime N/A
Dept (EGVN) BRIZE NORTON
Dest (EGAA) ALDERGROVE
Route of Flight EGVN..NITON.UN864.BILVO.UP6.NELBO.P6.BEL..EGAA/0053
Speed 0450
Alt 40,000
That would of been it altho it does say united air express it was in fact a Astraeus aircraft and was G-STRW -
http://jetphotos.net/viewphoto.php?id=6676217&nseq=2