"John Rowland" wrote in message ...
"Clive D. W. Feather" wrote in message
...
I couldn't tell you when, but it was used at least once when
the normal exit was blocked for overnight maintenance work.

Thanks. Its existence can't be crucial, though, because AFAIK the comparable
n/b slip no longer exists, even though if it did exist it could still be
used for n/b traffic when the normal *entrance* was blocked for maintenance
work (obviously the s/b traffic would have to be diverted via the s/b slip
as well). Oh, hang on, do you mean the exit at *Junction 2* was closed?

The exit at Junction 2 was closed for a good while (several months)
around 1996-7, but the slip wasn't opened for that. Never worked out
why.

AFA the southbound slip is concerned, I'm beginning to wonder why it it was
closed at all. It would be very useful for people living in Hendon if it was
reopened permanently and called Junction 3. Either that or build on it, but
at the moment its just a waste of land.

True. When I worked in Colindale it was a right pain trekking far
enough east to be able to hit the A1 northbound and get onto the M1.
Often the best way was to take the A1 southbound and find a place to
make a U-turn.