I worked at Twyford Moors Helicopters out of Sherbourn in Elmet just as Wally was starting with his Hughes 269, he also had a Bulldug I think. He may have been tight and a bit of a rogue and we had a few "discussions" etc, but he could surprise you.
My wife and I were having a meal in a retaurant in Tadcaster when a bottle of champagne appeared, on telling the waiter I hadn't ordered it he said "compliments of the gentleman over there", yep it was Wally!
He was the receiver when TMH went bust.