Where is Syd Vicious burried, and do mobs of people 'hang out' at his grave like they do at Jim Morrison's?

Sid Vicious was cremated. There is a rumour that his ashes were accidentally spilled on arrival back in the UK and ended up in the airconditioning at Heathrow Airport. How true that is is anyone's guess.

There is another rumor saying that his mother sprinkled his ashes over Nancy's grave against her family's wishes. (Nancy was Sid's wife of course and he was the one who killed her.)

Both these rumours were circulated but neither have been confirmed.
As Jac has replied ,his final resting place, is supposedly, the arrivals lounge, Terminal 2, Heathrow Airport, where his mother dropped the urn, and the air conditioning blew his ashes all over the airport staff.
As Roxanne33 has replied, his mother, Anne Beverley supposedly climbed the wall to a cemetery outside Philadelphia and sprinkled the ashes over the snow on Nancy Spungen's grave.