Citation Hunt

The Wikipedia snippet below is not backed by a reliable source. Can you find one?

Click I got this! to go to Wikipedia and fix the snippet, or Next! to see another one. Good luck!

In page Railways Act 1921:

"

The regional groups initially proposed were five in England (southern, western, north-western, eastern, and north-eastern), and a Scottish regional group.[5] Railways serving London were intended to form a separate regional group, but this amalgamation was delayed and took place in 1933.[6] (see London Passenger Transport Act 1933).