MR. 2 Mainplane Overstressing
Oxenos,
I am assuming that the aircraft utilised for the display were MR. 2C or MR.3 Shacks which could take the necessary positive G for an inside loop. From what I remember The vipers on the MR.3 Phase 2 Shacks would cause over flexing of the wing spars due to the bending moments. No. 37 Sqn had the MR. 2's. I can see how leaving rocket pods would cause similar issues to MR.3 Phase 2 Shacks.