4. 80 - Hackbridge to Belmont. This is one crazy route which meanders all
over the place
I don't think I've ever seen a route wander around as much as the 191
from Brimsdown to Edmonton Green. (Although the H13 from Ruislip Lido
to Wiltshire Lane probably has the two closes-to-each-other termini.)
Apart from the H10 of course - Harrow Bus Stn to Harrow Bus Stn, via
much of the local area