wrote in message
...
On Mon, 17 Jan 2011 19:34:09 -0000

Personally I think it would have benefitted a LOT more people if the money
had been spent on upgrading the NLL to a proper metro style service with
trains once every 5 or 10 minutes which would have provided a realistic
alternative to tube travel around north london.

The 8 tph peak and 6 tph offpeak from May 2011 seem to broadly meet your
definition of a NLL metro style service. Beyond those frequencies the
limiting factor is the freight services, and removing freight would mean
something far more costly than a line upgrade.

Paul S