5th uni for maths & physics??

I’m doing nearly the same- Cambridge imperial ucl and lse- and im going to have qmul as my last choice cause it’s still in london but has MUCH lower entry requirements

You are aware that Cambridge isn’t in London?

Cambridge's "maths with physics" is not a joint honours course. You do both maths and natsci physics in the first year, then you choose either to continue with natural sciences or maths. There are a lot of theoretical physics options in the maths tripos but it isn't a physics degree and you'll likely have gaps. On the other side, natural sciences will be very light on maths - the maths courses are essentially "mathematical methods for scientists" rather than maths for the sake of maths. I know people who applied to Warwick Maths and Physics and Cambridge Natsci, and others who applied for just maths, so they are both reasonable options. For more information: https://www.maths.cam.ac.uk/undergrad/files/maths_with_physics.pdf. The only joint honours available at Cambridge are History & Politics and History & Modern Languages. Unfortunately Oxford does not have an undergraduate maths and physics course either.
Fifth options you may consider include Bath, Bristol, York, Lancaster and Birmingham. Some of these are "physics with maths" or "physics and maths" rather than "maths and physics", so the focus would be on physics in some cases.
Warwick gives offers to most, over 75% of applicants (this will include the "hail mary"/uncompetitive applications) for maths&physics, so I would expect you to get at least one offer. But Cambridge, UCL and Imperial could possibly all be rejections (with offer rates a quarter to a third ish) and you should plan accordingly.
As PQ said, if you are unsure don't put anything and wait until you have some offers or rejections.

I’m doing nearly the same- Cambridge imperial ucl and lse- and im going to have qmul as my last choice cause it’s still in london but has MUCH lower entry requirements

i am aware that cambridge is not joint honours, i am definitely more on the maths side and will likely only do theoretical physics units further on rather than more applied courses. Otherwise, thanks for the rest, i've been particularly looking into bath, as well as potentially surrey as a far safer option.

Applying to maths and physics joint honours courses. Live in London (near Heathrow) but willing to move. Predicted 4 A*s in maths, fm, physics and chem. So far chosen Cambridge, Imperial, UCL and Warwick. What do u think i should chose for my 5th choice?