We were in JL today, and decided to get DS's shoes checked as it was quiet. Bloke confirms that he's OK in the boots he's got, but I idly enquired about some sandals.
He brings some out - 'we've got none in a 5.5 G, but lets try the F'. Proceeds to jam DS's foot in (very high insteps), which involves unthreading the strap and wiggling it around. Proceeds to start looking at the fit from the toes up, ignoring the fact that you can see his poor little foot bulging out at the sides in an instant.
Needless to say, I can definitively say that DS won't be having Clarks or StartRite sandals this year, and we'll be trekking to the nice independant shoe shop again