This is very trivial and tangential but it does relate to the City and Docklands and is rather fun, albeit a thief of time.

How does it work? It tests your memory or knowledge of London’s public transport.

You type in, one by one, every ‘metro’ station that you can remember. This means Underground, Overground, Docklands Light Railway and Elizabeth Line. Out of town stations such as Reading on the Lizzie Line are included (there’s a free one for you!).

Tramlink and National Rail stations are excluded unless they are metro stations as well.

A map will show which stations you’ve entered. You can move the map around to see the blanks and (maybe) remind you of stations that you have missed. The map is geographic instead of schematic and it’s interesting to see where stations are in relation to each other.

A counter will indicate what percentage of them you’ve so far managed to remember. There are over 500 in total.

Find the quiz at london.metro-memory.com – and don’t blame me if you get engrossed and forget to eat or pick up the children.

You can play it on your phone but laptop or PC is better as you get a better view of the map.

If you don’t finish in one go then you can carry on from where you left off another time. This applies even if you’ve closed your browser or restarted your computer – provided you’ve not cleared cookies in the meantime.

The game will, not unreasonably, ask for a donation from time to time. You can bypass this and carry on or bung in a few quid as the quiz would have involved quite a bit of work.

Aficionados of I’m Sorry I Haven’t A Clue will, of course, finish at Mornington Crescent.

Test your METRO MEMORY