OP, writing as a former lecturer and admissions tutor in a very good but, as I said on another thread, not super elite RG STEM School, I think you are getting a lot of good advice here. Two points to consider:
- When an applicant feels very strongly about a particular requirement, such as the wish of your DS to stay in London, but is also in a bit of a bind, I agree it is worth honouring. That's the voice of experience.
But in the real world it may mean something else gets sacrificed. I hardly ever advise this, but in the current application cycle I do think Imperial is likely a waste of a choice and UCL is aspirational.
Try to keep your DS focused on the bottom line: he should be looking for the best fit where he can thrive.
@ChloeDecker and @mushroom3 have both recommended QMC London as a realistic choice. I agree. What the programme is like, I have no idea. There are loads of other good universities in London - if London is really the priority. Another option, as PPs and you yourself have said, is to take a gap year. Boys mature later than girls and I think you said your DS is the youngest in his year. He has good options for a gap year. On these grounds alone it sounds an attractive plan. Ideally he would then be applying with good A-Levels in hand, but he would also have a chance to retake them.
If your DS doesn't like any of these ideas, the only alternative I can see is to enlarge his scope beyond London, where he will find lots of good options.
- I heartily agree with everyone who questions why he is being encouraged to sit four A-Levels. Only a small percentage of pupils can do this without undue stress and/or detracting from their results in the first three A-Levels. I cannot say strongly enough that within the RG every admissions team prefers three stronger A-Level grades to four weaker ones: that ranges from A A A vs A A* A A to
BBB vs BBCC.
On another current thread, the teacher and the two self-confessed academics (including me) are the most insistent voices favouring three A-Levels. Many parents are appealing to intellectual/cultural breadth and I agree this is inherently attractive. But it is at odds with the English admissions system, and the majority of pupils who attempt four A-Levels are handicapping themselves unnecessarily. I have seen too many dreams fail because ambitious schools pressured perfectly capable students to conform to a charming, old fashioned idea of a well-rounded scholar at odds with current English admissions procedures.
Given that your DS enjoys English and is doing well, I wonder whether he could keep that and drop the subject I don't remember seeing on the thread? I believe that would leave him with Chem, Maths and English. Sounds a good and slightly creative selection to me.
Good luck!