The Cathedrals Express, 70013 Oliver Cromwell, 22/02/2018.

Filmed at Diss:

The 1Z70 10:20 train named 'The Cathedrals Express' passes Seven Kings whilst travelling eastbound on the Great Eastern Main Line from London Liverpool Street station to Norwich.

A Steam Dreams leisure railtour
http://www.steamdreams.co.uk/

The train was operated by West Coast Railways
http://www.westcoastrailways.co.uk

Hauled by:
British Railways Britannia Class steam locomotive No. 70013 Oliver Cromwell

Passenger coaches:
British Railways (Mk1 and Mk2)
Pullman Car Company

Plus:
British Railways Class 47 diesel locomotive 47 804 (I only learnt of its identity after the film had been made)

The first part of the film shows the train passing part of Ilford depot, after the train had passed I quickly crossed the road and was able to see it as it passed through Seven Kings station.

btw, Seven Kings station is currently served by trains operated by TFL Rail, and in December 2018 will become part of CrossRail line 1 (Elizabeth line).

Filmed 22nd February 2018.