The Tiger Club do have an approved Stand on Wing or 'SOW' rig, (The great Lewis Benjamin of the Tiger Club invented the CAA approved rig back in the 1960s) but it is only used for genuine display flying and display flying practice within the criteria laid down in the CAA approval for the rig. i.e no punters allowed other than those female club lunatics 'approved' by the Chief Pilot for air display purposes. As somebody who has done a fair bit of SOW flying over the years, you most certainly wouldnt get me up there.