Mr Thant wrote:

Wouldn't they be using the Jubilee line from Stratford if they were in
Essex? And the Bakerloo, Metropolitan, or Picadilly if they were in
west London?

Not sure I follow - I think the Central is currently the more sensible
(if overcrowded) route from the Stratford direction to central London.

Have to agree - it's longer on the Jubilee. Indeed when going from Stratford
to London Bridge or Waterloo I've found it quicker to go via Bank than take
forever on the Jubilee.