I go Lordship Lane, Sydenham Hill, Crystal Palace Parade, straight on down Queen's Road, left down South Norwood Hill, right onto White Horse Lane, right down Thornton Heath High Street to the clock tower, left past Thornton Heath Station to the end of that road, right to Thornton Heath Pond (a few yards on from where you turn right), turn left there then straight run through to Ikea. Not forgetting to call at the Chinese supermarket and/or Wyevale's (bit further on where the old Purley Way swimming pool used to be). Edited to add: Gone this route loads of time, never had any problems Edited again to add: I've been to Ikea on a Friday night and it was virtually empty