5. The shortest distance between two adjacent stations on the underground
network is only 260 metres. The tube journey between Leicester Square and
Covent Garden on the Piccadilly Line takes only about 20 seconds, but costs
£4.30. Yet it still remains the most popular journey with tourists.

Cheaper with Oyster, and does this record number of tourists really
catch the train from just Leicester Square to Covent Garden, or is this
conflated with Covent Garden perhaps being the station with the biggest
flow of tourists?

6. Many tube stations were used as air-raid shelters during the Second
World War, but the Central Line was even converted into a fighter aircraft
factory that stretched for over two miles, with its own railway system. Its
existence remained an official secret until the 1980s.

I don't think they "converted" the Central Line, it was under
construction and re-purposed as a factory, and only completed and handed
over as a railways after the war.

8. The shortest escalator is Stratford, with a vertical rise of 4.1m.

"at" Stratford, perhaps.

14. The deepest station is Hampstead on the Northern line, which runs down
to 58.5 metres.
15. In Central London the deepest station below street level is also the
Northern line. It is the DLR concourse at Bank, which is 41.4 metres below.
66. Amersham is also the most westerly tube station, as well as the highest

Another missing factoid is the deepest platforms below sea level.
Possibly Jubilee Line at Waterloo.

21. The station with the most platforms is Baker Street with 10 (Moorgate
also has 10 platforms but only six are used by Tube trains - others are
used by overground trains).

Given that it's not the Overground, perhaps "National Rail" trains would
be a better description. They are also counting the now-closed
Thameslink platforms, which is a bit suspect.

28.The station with the most escalators is Waterloo with 23.

I wonder how that's counted, for example there are two which are
arguably part of the National Rail station, plus another two very close
by, that used to travel up to the Eurostar Concourse.

58. The total number of lifts on the Underground, including four stair
lifts, is 164.

Same question really. How many of the lifts at Kings Cross/St Pancras
are deemed to be "On The Underground" and how many are part of the
National Rail infrastructure.

90. According to TFL, London Underground trains travel a total of 1,735
times around the world (or 90 trips to the moon and back).

How often? Daily, annually...

120. You can now no longer go around the Circle Line in a full circle. From
2009, the Circle Line terminated at Edgware Road.

But you can still travel from Edgware Rd to Edgware Rd, which is a full
circle.

125. Nineteen stations just use lifts.

They have stairs as well.

--
Roland Perry