Ah yes. 20th July 1965 it was and G-AMOL was the aircraft in question.
The report says:
"Viscount 701, G-AMOL departed Ronaldsway at 16:49 for a flight to Liverpool. The flight was made at flight level 70 and at 17:08 hours the aircraft was identified by Liverppol radar over Wallasey and positioned for a PPI continuous descent radar approach to runway 26. Half a mile from touchdown the radar approach was completed and the aircraft was then seen (on radar) to be just discernably to the right of the centreline. No radio messages were received from the aircraft after the start of the talk-down. At 550 metres from the threshold, it was estimated to be at a height between 30 and 60 metres and about 40 metres to the right of the centre line. At this paint witnesses saw the aircraft bank and turn to the right. The fuselage was level and the aircraft was banked almost vertically for part of the turn. When heading in approximately the opposite direction to the runway it rolled on to its back and crashed into the roof of a factory about 365 metres to the right of the extented centre line of the runway and about 550 metres from the threshold.
PROBABLE CAUSE: "The aircraft went out of control during the final stage of an approach to land but the reason for this has not been determined."
I recall subsequent discussion about flap failure but I cannot find if this was proved. It featured in an earlier Viscount 701 crash at Manchester (G-ALWE BEA, 1957).
A great airline indeed and some excellent people working for it.