Not sure what to put as insurance? Maths Bsc

I've received all my offers and am putting Bristol as my firm (AAA), and I have an unconditional offer from Leicester as well as an offer of AAB+A in EPQ from Birmingham.
I'm stuck between these two as to which I should put as my insurance, as Birmingham isn't particularly safe as it's only a grade lower than my Bristol offer.
However I know Leicester isn't as good as the other unis I've received offers from, plus I haven't visited the campus so I don't know what it's like.
Any advice would be appreciated, or just opinions on each university would help

You have until May to decide. There. Is. No. Rush.

Yes, but I'd rather get UCAS out of the way now, as my own personal choice