RAF can do it too!
This reminds me of a similar problem on an RAF VC10 a few years back when I was flying them.
Turnround visual inspection showed wrinkling of the aft fuselage under the engines. An "expert" was flown out to a/c, declared it "fit one flight back to Brize" (from Canada I think) and the wrinkles were all marked with indelible ink.
The crew said said they would fly it if the "expert" was a passenger - he didn't want to but eventually agreed.
When they got home, all the wrinkles had moved and serious delamination of the skin was found. The skin had pulled free of the ribs due to corrosion.
The engineers then nearly wrote the jet off when jacking the back up to a force of 2 tons to put it back into shape, they misread the gauge and tried to turn it into a banana by applying 20 tons of force!
Now, this is not the same as the famous Tristar moment when the crew stuffed a mainwheel up into the wing, cracking the spar, and then flew a go around - in the VC10's case it was old age not idiocy!