There are a number of activities including wing walking that are closely monitored in the United Kingdom by the CAA or the Civil Aviation Authority. It has been decided by them that activities such as wing walking in the United Kingdom cannot be allowed on the basis of financial reward or gain. These services are available without any financial reward involved. There are certain companies that do offer these services as a gift package however. You could try contacting www.gary-king.co.uk or
thanked the writer.