Ooh not sure, I had it on the back of a loola. I think the buggyboard website has details of which pushchairs are compatible. I'm in Sussex but DP works in London so if it fits I'm sure we could sort something out
Never had one of these, but had a strong bar that happened to be there (bebe confort) that DS used to stand on. The thing that always strikes me about those steps is the weird lunge position the mums pushing have to adopt to avoid tripping over the board.