On 2010\09\28 11:57, Walter Briscoe wrote:

Piccadilly: EW except NS at Finsbury Park

Unless it's changed recently, it was N/S at every station from
Cockfosters to Russell Square, and N/W at Holborn (the Aldwych platform
was called southbound from Holborn).

Incidentally, my spell-checker tries to turn Cockfosters into, well,
French MEPs.