Littleham I would point out to your daughter that if she is enjoying studying History at A level, and especially beyond the syllabus, then she will already have those aptitude skills being tested by HAT, and be using them, and is likely to do well. Motivation follows aptitude. I would present it to her as the university giving her another chance to provide objective evidence that she is right for the course and that will mean that when it comes to interview they will already know a little more about her, which can take the pressure off, a little
Pre testing is in any case something she will encounter a lot when applying for jobs, often many stages of pre tests, telephone interviews etc. etc.
ventura there you go again, no one else is entitled to a different opinion, in this case only a slightly different opinion
. I wasn't slagging anything off! I just ventured the opinion that there are other excellent departments with different approaches and specialisms that prospective applicants might want to consider according to their own interests and what is important to them. They are all excellent, I never said they weren't. The specific ones we have discussed are generally regarded ahead of a field of approximately a hundred (unless you are after a particular specialism), quite a few others are also excellent. Unless venturing the opinion that the History course at Oxford isn't "best" judged on the basis of every possible measure or set of students needs is slagging off 
Every opinion I have ventured I have offered in the context of my experience, direct or otherwise, ( whilst trying to keep it from descending into boasting or dreary exposition) and people can place a value on that opinion as they wish and according to their own perspectives. Whether anyone choses to believe me is of course up to them, I may of course under guise of anonymity be a childless old woman who has never been near a school or uni sat at a Formica kitchen table in a lonely bedsit with ketchup dribbling between the bristles on my chin as I type out bile about everything that matters to you. You might also be. Obviously the reader will weigh up the evidence and decide what weight to put on any post on mumsnet.
It is just I have never felt the need to air that thought process online, obviously debate objective facts and opinions, but demanding concrete proof via names and places of someone's credentials , which effectively implies you think someone is lying, and then decreeing their point of view invalid without that, it's a touch of guilty until proven innocent isn't it? And unnecessarily personal? And not really what mumsnet is about, on this thread anyway, it is surely for sharing opinion knowledge and experience?
I am glad your son is enjoying the History course, that's the important thing.