On Mon, 15 Sep 2003 13:45:40 +0000 (UTC), "Terry Harper" wrote:

"Paul Weaver" wrote in message
. com...
Came through the dartford tunnel for the first time tonight, in the
right hand land, and noticed, just underneath the 50 limit, a white 10
on a blue background - is this a minimum speed limit sign? I didnt
think the UK had them. Why is it only on a 300 yard stretch?

It's not. If you go through the right hand bore, the limit is only cancelled
at the exit, just before the end of the 50 max limit. The first sign is just
after the toll booths.

I think there's at least one at Blackwall as well.