'I Spy' - lifting the lid on railways

This from Sheepbridge...

'I-Spy' books have apparently returned to our bookshelves (now sponsored by Michelin) and seem to be offering a wealth of additional extra dimensions to the avid 'spotter'.

In my day, my ABC consisted of locomotives and the like.


Has the hobby really degenerated to spotting railway carriage lavatories ?

UPDATE: This from Sussex Driver....

Is there a category for working toilets?

Surely this would be worth bonus points!