Hi,
I've heard before somewhere that any ticket taking you to "London Terminals" allows access on the tube in zones 1 + 2 - is this true, and what are the conditions?
Thanks!
Assuming you're travelling from Merseyside (which is shown as your location.)
A "London Terminals" ticket allows you to travel on any permitted route to London, assuming it's not an advance which restricts the route. Permitted routes I'm aware of are using VT's Liverpool-London service, using another VT service from Crewe, using LM's Crewe-London service and travelling via Birmingham. Once you've reached a London terminal your ticket has expired.
You can also use a "London Eurostar CIV" ticket which allows you to travel on the Underground between the terminal you arrive at and St Pancras only.
There's also tickets for through travel via London, such as to Brighton, which allows you to use the Underground between different London terminals.
The two above instances do not allow you to break your journey at an intermediate Underground station.