Sadly, the only Walrus highlighted on Youtube is Hendon’s, though one briefly appears on the linked vid of K5054’s maiden flight. So no-one yet has film of Mutt looping it. Pity…

I’ve not come across footage, but it was reported in all the journals. They thought it strange, can’t see why! 😀 What’s a K5054? 😉

However actually Mutt looped the prototype Seagull V. 😉 Pathe (http://www.britishpathe.com) has footage of it being shot off Farnborough’s catapult and other interesting footage if you search.