"Dave Arquati" wrote in message
...

LOL! I've driven a narrowboat before on the Grand Union (not in London),
and it's a very relaxing experience, but at a maximum speed of 4 knots,

4 (statute) miles an hour. Inland waterways don't use knots. Well now they
don't use MPH either thanks to the EU and the government forgetting to get
exemption for waterways from metric measurements.

it would take an awfully long time to reach Canary Wharf from Heathrow...
:-)

Dave