"Dave Arquati" wrote in message
...
Your primary option is a Zone 1-2 Day Travelcard (there's no Z1-only day
travelcard), at £4.30 off-peak. You should be able to buy this at any
station, even if it's outside those zones (showing your Z2-6 will help
convince them you're not being funny).

If you're only visiting a single destination in Z1, then a Z1 extension
for each leg (£2 each way) will be slightly cheaper. The extension cost
you quoted sounds quite out of date.

If you don't mind catching the bus from Vauxhall, you don't need to buy
anything extra; your Z2-6 Travelcard is valid on any bus, and there are
at least ten routes serving Vauxhall bus station (including one to
Waterloo).

The no 77 goes to Waterloo.. only take bus if you have time to waste as you
have to wait ages for one to arrive.