On 11 Mar, 14:08, "Basil Jet"
wrote:
Offramp wrote:

Anyway, it might be a nice spin out on a boat, 'for free'.

Without disagreeing with that, the Woolwich Ferry a few miles downstream is
free all the time.

YES! Not my neck of the woods...
Just as an addendum, I found out the reason: the Blackwall Tunnel
shuts at some time, meaning that replacement bus services cannot run.

I have been told 4pm, but 20:30 seems to be the official time.