harrow on the hill is the station if you want to go to the junction etc. Sunday night I may be out having a band practice but not confirmed yet, if I don't I'll come and meet ya.
To get to the junction, when you come through the gates out of the tube, turn right, go down the stairs, should come out at the front of the station, then turn right and walk to the end of the road, cross over the road to the side where Maplins is, walk up to the corner, you'll see a pub called the trinity right on the corner. walk round that corner, you should see the entrance to the junction, has a wooden fence running right along the front