Background is that I am a mother following a traumatic baby loss and several baby losses before so am extra protective, but....
Had a call from reception class that our 4 year old had a head wound and needed hospital treatment to glue it together. Turns out they had been on a bike without a helmet as no helmets are provided, I've emailed to check but it seems to be agreed by others that it is the case.
AIBU to expect a helmet per bicycle to be the rule
YABU overprotective, let them live
YANBU helmets are essential if providing bikes