From this week's TFL Weekend travel information email:
"Finsbury Park - Between 21:30 and 23:00 on Saturday and 21:00 and 22:30 on Sunday, Stroud Green Road will be closed between Tollington Park and Seven Sisters Road. There will also be delays to traffic in the area. This is for an event."
Any clue what this is about? Surely not the classical music festival.