Bumbly - there are some other threads on this.
It seems that is far easier to be deemed competent to accept a vaccination, rather than refuse one. What a surprise.
I understand that the flu vaccination is attracting some controversy as it contains pork gelatine and therefore is being refused by many for religious or ethical reasons. www.bbc.co.uk/news/uk-england-leicestershire-24113970 Not sure why therefore being vegan isn't seen as a valid reason for refusal.
I doubt it will happen (to the 15 year old at least). My eldest son is not competent, never will be and will not comply with medical treatment. Despite having our consent there any many medical procedures that have not being carried out (for example being x rayed & treated for a suspected broken ankle, having teeth checked, being given nurofen, having blood pressure taken, having throat checked - all abandoned because he was not compliant). I would be staggered if any doctor or nurse held down a 15 year old (or even an 11 year old) to forcibly vaccinate them.
It is usual for 12 year olds to be asked to consent to HPV (they are asked to sign the form) so very very unusual for a 15 year old not to be listened to about what she wants in her body. Even in life or death situations (which this is not) forced treatment is a difficult area.
Anyway it says that despite the deadline passing the vaccination has not yet been given due to 'practical' problems. My guess is that is finding someone willing to force vaccinate.
If the father was so keen & the mother so loopy he should have been able to present his side of the argument to the girls for them to understand. They will have plenty of people around them who can give the 'pro' argument. Having been given both sides they should be able to be asked their opinion. Or maybe suggested the older girl had an immunity check as she's already had the primary dose anyway. I can't see that forcing an injection on them will do much for his relationship with the girls.
My 11 year old ds2 knows that his grandmother is deaf in one ear from measles, he knows that vaccinations make it much less likely that you will get the disease. He also knows that he is not vaccinated against measles, and knows why he isn't - at the moment he is happy with the reasons he has been given for that.
If at 15 he decides he wants to be vaccinated I can't imagine any GP refusing him, whatever I thought- it would be about his views, not mine.