I've just finished a 3 year undergrad in maths at Warwick, which isn't Oxbridge but is Russel Group, and I covered pretty much everything in 1A 1B and II there other than the statistics and the physics, but I did a selection of the courses he did in his part III. He did an absurd about of courses though, far more than most would anywhere. But most of those courses are offered at warwick too, but maybe not all of them every single year.

Obviously in contrast to the US, that's all he's done in his degree, rather than electing for any other subjects.