I came across data sets for underground station passenger numbers via
https://www.powwownow.co.uk/smarter-working/londons-most-stressful-tube-stations and have been ( I admit it) playing about with the base data ... finding out which stations were proportionately less (or more) busy on a Sunday. Little surprise that the City of London is dead on a Sunday, with the West End much busier - in fact as there's probably a sparser tube service on a Sunday, I suspect that the passengers per train at places like Hyde Park Corner is probably higher on a Sunday than on a weekday.
0.085 Moorgate
0.127 Farringdon
0.131 Chancery Lane
0.155 Bank & Monument
0.166 Cannon Street
0.177 Mansion House
0.182 Upminster Bridge
0.184 Chigwell
0.189 Roding Valley
0.212 Moor Park
0.216 Temple
0.216 Aldgate
0.226 Great Portland Street
0.229 Grange Hill
[snip]
0.697 North Greenwich
0.710 Lambeth North
0.786 Covent Garden
0.789 Knightsbridge
0.823 Queensway
0.838 Leicester Square
0.847 Hyde Park Corner
0.854 Chalk Farm
0.869 Bayswater
1.074 Heathrow Terminal 4
1.132 Heathrow Terminals 123
1.163 Heathrow Terminal 5
1.474 Mornington Crescent
2.535 Kensington (Olympia)
Much much more in the data sets ... and there are sheets going back a number of years ... real goldmine if it's your sort of gold!