Route N20 in the Morning By George

Route N20 Is Operated By Metroline from Both Potters Bar & Holloway, it runs between Barnet Church and Trafalgar Square, but towards the latter part of the night the route curtails to Euston, where services from Holloway are withdrawn and the route is left to continue until when the the last bus reaches Barnet at roughly 6:45am.
 However,on a Sunday an extended service runs which means the last bus to reach Barnet Church gets there at roughly 9:45am, making it one of the longest serving night routes in London.
The Service Pretty Much covers the whole of the High Barnet branch of the Northern Line and parts of the Charing Cross Branch.
Now Me Being an Early Bird for some strange reason I left to catch the last remaining N20s as it is one of my local night routes and took some shots of the route
One fact to note: On the last stretch of the route it passed through the postcode N20 I presume this is why the route is named after the postcode please tell me if i am wrong

N20 Metroline (PB) TP447 LK03 GHG seen near North Finchley

N20 Metroline (PB) TP437 LK04 GGP seen near North Finchley

N20 Metroline (PB) TP431 LK03 GFZ seen at North Finchley

N20 Metroline (PB) TP442 LK03 GGZ seen near North Finchley