On 2011\03\01 22:55, Robin9 wrote:

Does anyone know why they have not taken it through Canonbury tunnel to
Finsbury Park? Lack of money or lack of understanding of London's public
transport requirement? It looks at though some work is being done to
facilitate trains through the tunnel again.

I wasn't aware it closed... it was singled when the overhead went in,
because there isn't room for double track with overhead.