I don't know if the toblerones were always intended to be used, or a temporary measure because of late delivery of the destination blinds (for which there was clearly space provided)
And here's a 1994 in-car map, shortly after the Beckton extension was opened - through running was not possible at first because the branch was opened with the new signalling system, not compatible with the original one.
Toblerone? Weren't they four sided? Also showing 'Poplar' (white on black??)
crusty54 - one could make a start with numbering the routes on the map, tho'
norbitonflyer - I've often wondered how the tram routes escaped LT's passion for order - perhaps the survival of TE Thomas as the relevant MD explains it? It's a very common thing in ex-Commie countries, however - when I was in Tallinn, they had route 1 buses, trams and trolleybuses all with quite different routeings.
The prize for stupid - as in really stupid - duplicate numbering probably goes to the Basingstoke of c2000, which managed to have three routes 1, a Premier route and a First route (all different operators, of course). [Then there was the first generation of Athens tramways which managed to have two routes 3 (as I recall), going to the same outer termini but by quite different routes; their only distinguishing feature was different electrical control equipment - presumably the punters checked the equipment cabinets on boarding...]