Original post by AnonymousHi!
I think one of the first things you need to consider is how competitive Law in general is, let alone Law at Oxbridge. At Oxford, there are 8.4 applicants per place for Law, and at Cambridge it's 6.7. That, in the crudest way possible, means you have to out-compete upwards of 6 people to get a place to read Law at Oxbridge, in your academic profile, personal statement, LNAT and Interview, as well as the references given by your 6th form/College.
As well as this, none of the subjects you are planning to take for A-level are entirely essay based, which would be quite off putting for Oxbridge. I'm not suggesting that you change to 3 essay based subjects, but you certainly need to be doing at least 1, as without this Oxbridge may not believe that you have the academic capabilities to do well on their course, as your essay skills wouldn't be strong enough. As for grades, a Freedom of Information request from 2017 uncovered that for the 2017 admissions cycle for Oxford, the average number of GCSE A*s (8/9s) for successful Law applicants was 7.76, with the average number of GCSE Cs (4/5s) being 0.08, with the majority of applicants achieving exclusively A*s and As, with some Bs. Furthermore, you would be required to sit the LNAT, and the score you get on this can dramatically affect your chances of being offered a place.
So overall, your GCSEs would likely be okay for Oxbridge, but only if you could show strong academic capabilities, specifically in essay based subjects at A-level, and unfortunately your current A-level options just wouldn't demonstrate that. It is also very likely that as you would not be studying any essay based subjects, your 6th form/college wouldn't support your application to read Law as they have a lot of extra admin they have to do, especially with the admissions tests and extra references and written work required, so would likely not support your application, as your chance of being successful is very low if you're not studying an essay based subject, or two such as History, Law, Politics, Philosophy, English Literature etc.
That isn't meant to come across as telling you to give up! I just want to give you genuine advice because if Law is really what you want to do, you may find many doors slammed shut due to your A-level options.