My youngest is 17 yrs old GANFYD and yours have been or are at medical school you say, so there may not be a vast difference. I'm not too bothered by age in any event. Apparently I look years younger than my true age. Eight DC keeps one young! I assume you prefer not to say where your DC go, unlike all other posters on these threads. Fair enough - although not sure why it would be a problem.
Can I just say that your latest posts display quite extraordinary immaturity, along with that same level of unpleasantness displayed early on in the post about a particular section of young people being dull, nerdy and unpopular. Not qualities I look for in a doctor.
I think Needmoresleep makes very valid points about the UKCAT. While I anticipate a screeching of opposition from the self-styled experts on this thread, there is an alternative, which is to take only the BMAT. It can be worth thinking about. Our school doesn't try to dissuade for appropriate students. One of DSs closest friends at school achieved four offers taking BMAT only, including Oxford, despite the millstone of having been a senior prefect!
DS also opted for BMAT only and it hasn't done any harm, either short or long term. It's a clear option. Of course one has to want to go to the schools in question but there are slightly more options now than there were. The whole question of early/ late BMAT is a consideration to factor in to that approach and will affect the choices.
For context, our school sends huge numbers off to med school each year and has done for a very, very long time. It's the largest destination for leavers'. Usually a minimum of ten students go off to med school, often very many more, so it's not credible to believe the advice given at the school is poor. The last time a student failed to get a single offer was for entry 2011 but since then the school is back to year on year very strong success - and very different from the despondent note sometimes found on these threads, where the mantra is that it's so hard and so stressful. It's not - and with the expansion in numbers it's getting far easier!