Sorry, northwing, I was quoting Lee Jones, who led the Team in 1965. He said that Bill Loverseed had first suggested removing Fuse 13, so off they went to try it. Eventually, after getting over the shock of the amazing roll rate which resulted, they were twinkle rolling in close formation
"...and, of course,after a while 'They' caught on to what was happening and so 'They' said "You can't do that, because 'The Girls' at Boscombe Down (the Test Pilots), will have to take a year and a half to check it out" and we couldn't finish the season. So the order was "Replace the fuses immediately". But they didn't say to replace them serviceable, so we got old Bill to blow all the fuses and we put them back blown!"