Thanks ShadowPurser. Would appreciate your feedback.
The only reason that I ask if it was G-DOCX was that same aircraft appears to have a slight "history" in aborted departures and emergency landings. A friend of mine is BA Engineering at Glasgow, where the 734 fleet were most recently maintained. Charlie X-Ray was hated amongst the teams there because of repetitive avionics and instrumentation whinges.
Anyway - it may not even have been a 734 at all. Anyone able to confirm type?