When DS started preschool hours last Sept (aged 2.3 but we paid so mixing with children aged 2.3-5) our GP refused to give 2nd MMR early. He will have spent a whole year in the setting before getting his booster.
Tried to book mine in for his 2nd today but got told they have to prioritise the 10-16 year olds whose parents were -- too nutty-- unable to get their children vaccinated before, over younger kids who may not have full immunity but have at least had one vacc already. They will then be moving onto the 16-24 year olds who only had a single dose. Not sure why they are more important than toddlers who've only had one dose though.
I do feel it is unfair to dismiss people as 'nutty' for not giving mmr back then, I am not one of that group of parents myself but do remember it was a massive story. Not everyone will read the original research papers etc, and I feel although it has been publicly and thoroughly discredited not enough has been done to make up the lost ground. Even just posters up at the doctors or leaflets through school might have encouraged some parents to rethink in the intervening years.
Whatever the rights and wrongs of the choices made by parents, the teenage children are not responsible for being unvaccinated.