Alexandra Palace currently has the following National Rail services off-peak (all operated by Great Northern) which are served by Class 717 trains:
Weekday services
6tph to Moorgate
3tph to Welwyn Garden City
3tph to Hertford North (1tph extended to Letchworth Garden City) via Hertford Loop Line
A limited Great Northern service to/from King's Lynn, Cambridge and Peterborough via Potters Bar calls at Alexandra Palace in the late evening and at night calling at all stations en route.
 A few weekday business peak trains to/from Kings Cross also stop (into London a.m, from there p.m).

Weekend services:
4tph to Moorgate
2tph to Welwyn Garden City
2tph to Hertford North (1tph extended to Stevenage) via Hertford Loop Line
Other Great Northern services between Peterborough, Cambridge, King's Lynn and London often pass through the station non-stop, as do all London North Eastern Railway, Hull Trains and Grand Central services between London and the North/Scotland.
Northbound trains usually use the central line, away from the platforms, while southbound trains speed non-stop past Platform 2.
Alexandra Palace currently has the following National Rail services off-peak (all operated by Great Northern) which are served by Class 717 trains:
Weekday services
6tph to Moorgate
3tph to Welwyn Garden City
3tph to Hertford North (1tph extended to Letchworth Garden City) via Hertford Loop Line
A limited Great Northern service to/from King's Lynn, Cambridge and Peterborough via Potters Bar calls at Alexandra Palace in the late evening and at night calling at all stations en route.  A few weekday business peak trains to/from Kings Cross also stop (into London a.m, from there p.m).
Weekend services:
4tph to Moorgate
2tph to Welwyn Garden City
2tph to Hertford North (1tph extended to Stevenage) via Hertford Loop Line
Other Great Northern services between Peterborough, Cambridge, King's Lynn and London often pass through the station non-stop, as do all London North Eastern Railway, Hull Trains and Grand Central services between London and the North/Scotland. Northbound trains usually use the central line, away from the platforms, while southbound trains speed non-stop past Platform 2.
Alexandra Palace railway station