as above just had an mot and amongst the welding !! he sighted this as a problem

When I fitted the wheels I did see that they were close and so bent the little bracket round a bit and seemed to gain the clearence, but man with the rule/safety book sais there too close
So has anyone else had this problem? are shorter flexis an option?
any advice would be great I am new too this I'm spending loads and haven't even stayed the night in her yet! Hoping it'll all be worth it in the end