Ok after a little investigation, although the nearest station to the ground is Hendon Rail Station, the easier, the quickest and the best option for somewhere to eat, drink and watch the Arsenal – Spurs game is via Hendon Tube station.
With that in mind getting the following train service;
BSKĀ at 10.17am arrives London Waterloo 11.08, then 11.20am tube via the Northern Line arrives Hendon Tube station at 11.48am.
I will add prices later but will be a travelcard for the day.