Minimum connection time across London (advance ticket)

[ABB125]

https://www.nationalrail.co.uk/times_fares/ticket_types/46587.aspx#travelling_connect

Believe this explains it quite well.

I saw that, but it's got a different symbol on it, hence my slight confusion!
Personally I think my definition of "reasonable" might differ from National Rail's...

 

[Ianno87]

That's what I expected, thanks.

Though, if that's the case, presumably it's fine in the other direction (LST to Lancaster Gate) because you can break your journey before you reach your (Underground) destination station?

That is the rule as I understand it, yes. Though the only time I tried to exercise it (at Tottenham Court Road) I got grief from the gateline staff....

 

[ABB125]

There's a page on the National Rail site that includes the list of cross-London transfer stations: https://www.nationalrail.co.uk/times_fares/ticket_types/46587.aspx#travelling_connect

You'll be pleased to know that Lancaster Gate does feature on the list, as do Aldgate and Tower Hill (both for Fenchurch Street).

Great!

That is the rule as I understand it, yes. Though the only time I tried to exercise it (at Tottenham Court Road) I got grief from the gateline staff....

Grief from gateline staff? Never...