All the young people these days are so tall! DS1 is 6ft 3, he can never comfortably fit in a standard single bed if it has a footboard. DS2 will be over 6ft as well. The average adult seems to be getting taller, judging from when I was a dwarf at 5ft6 in a crowd at an event which consisted of 20 somethings.
If Ikea standard singles are longer than standard UK ones, how come standard UK ones have never increased? I assume the standard has been around a long time, way back when adults were shorter?
As for standard caravan single beds....forget it once your child is about 12.....