I have found a solution!!
Thanks to George who sends the additional straps (towelled and thins), I now use the thin waste strap to stop my inner thigh pad creeping around the inside of my leg!
How?
Well, I attach one end on my main thigh pad and then run it around behind my bum and attach it to the inner thigh pad!
This makes it impossible for the inner thigh pad to creep around the inside of my leg as it is being held back by the extra strap!
Problem for all intents and purposes - solved!
I will road test it in the match next weekend, but I am 100% certain, that it is not possible for the inner thigh pad to creep and get in that awkward spot between both my bloody thighs!!
Praise Jesus!