Someone popping down to Asda on their bike is not blocking the road, whilst a bunch of roadies riding two/three abreast on a narrow lane, most certainly are and will be viewed differently.
legally the same i believe, just depends on whether the guy behind the wheel of the following car is a dick. 3 abreast you might have more of a point, possibly.
If they wanted a Royal then what was wrong with Princess Anne or Zara who have been Olympians rather that this waste of space.
interchangeable aren’t they? a royal is a royal is a royal is an accident by birth or they married into it, doesn’t matter which one, does it? If you wanted Anne or Zara cos they were olympians then you could have picked any other olympian, needn’t be a royal.