Best peroxide blonde out of a box?

[UltramarineViolet]

If anyone who dyes their own hair could recommend which products they use I would be very grateful

I want to minimise risk of any brassy/yellow tones

my natural hair colour is dark blonde/ mousey and my hair is fairly short

First you need to bleach with a mix of 20 volume and powder - any brand is fine. Then wash that out and use a platinum or icy white toner.
If you have a hairdressing supplies retailer near you you could look there, or Amazon or other online store. Boots etc don’t sell what you want, or don’t have enough choice. If you must do Boots, Bleach London are your best option probably.
You’ll want to look a a YouTube tutorial from a real hairdresser before you start, bleaching can go wrong very easily.

I always find the live colours are great, also get some silver shampoo just in case you get the odd brassy strand x

I would have a look on

https://www.sallybeauty.co.uk/hair/hair-colour-and-bleach/hair-bleach-and-lightener/

agree if going to Boots or Superdrug go for Bleach London. They also have a white toner kit to use after bleaching and they do a good mask that I’ve used before to help strengthen hair after bleaching.

https://www.superdrug.com/hair/hair-colourants/hair-toner/bleach-london-white-toner-kit/p/744639?gbraid=0AAAAADp4mz-qtrpT07vIPJzt1LgqIfQQH&gclid=CjwKCAjwysipBhBXEiwApJOcu8JF5C71z-vHwwVdczjE7hhFs_YTjkRXDa2aHL7Xfcv7NmAxSTU5WBoCZ5IQAvD_BwE&gclsrc=aw.ds

https://www.superdrug.com/hair/hair-treatments/hair-masks/bleach-london-reincarnation-mask-200ml/p/744517