In article , (Clive D.
W. Feather) wrote:

In message ,
Rob wrote:
Read this article

http://footprintsoflondon.com/2016/0...ry-route-numbe
rs-in-the-700s/
today which says that Green line routes are in the 700 range because
trolley bus routes were reserved route numbers 500-699.

When I was a lad:

1-299: red buses

200-299 were reserved for single deck routes until the trolleybus
replacement programme.

300-399: green buses in the north

and 800-849

400-499: green buses dahn sarf

and 850-899

500-699: had been trolleybuses, with 500-519 reused for "Red Arrows"
700-799: Green Line (longer-distance express services)

Green Line were limited stop too.

--
Colin Rosenstiel