Directions from Heathrow Airport by bus (Harlow Green Line 724):
Do NOT go into central London. Travel direct by bus.
Travel time a little over one hour. Bus every hour.
Route and Times

You cross the M10 motorway below you and then get off at the King Harry Pub
just before descending the hill towards the centre of St Albans

This gets you to: Map Come along the road B4630 (bottom of map)
Get off at the King Harry Pub at the end of King Harry Lane, just off themap to the right