Whilst Redbridge is on the Central Line it is not and never has been the end of the line terminus. Also the mention of a disused station called Post Office blurs the fact that the original Post Office station still exists in Smithfield, albeit renamed St. Pauls in 1937.
King is drugged and guided towards a watery death. A stunt double with much shorter hair substitutes for the actual dive.
Whilst the opening datestamp states the tube fatalities take place on November 22nd, the "Daily Express" reporting on the event is dated Saturday September 16th 1967.
As with the jogging sequence, no attempt is made to switch the back-projected traffic's perspective behind Stewart and Annabelle as he drives her from her undercover secretarial work.
When Sullivan and Seretse are jogging, no heed is paid of their relative positions when they are placed against the fake back-projected background. The pair switch instantaneously but the scenery perspective remains exactly the same.
Whilst not necessarily a mistake as such, there is a staggering coincidence/credulity stretch at 29:20 when two near-identical cars bearing the consecutive numberplates RXD 996F - Stewart's white Vauxhall Ventora - & RXD 997F - the villains' Vauxhall Victor 2000 - are seen side-by-side. (In reality they were on loan to ITC from Vauxhall Motors' publicity fleet.)