In the UK, it’s illegal for any member of the public to carry a lethal or non-lethal self-defense weapon. The maximum sentence for possessing a weapon in the UK is 6 years in prison, whilst possessing firearms is 10 years. This includes pepper spray, any knife, or other weapon for self-defense. Any knife you can cary that opens one handed and locks...illegal. pepper spray...illegal to use. Your only option is to be faster or stronger than your attacker. Period.

https://brittontime.com/2021/10/22/everything-you-need-to-know-about-self-defence-law-in-the-uk/#:~:text=Are%20self%20defence%20weapons%20legal%20in%20the%20UK%3F,possessing%20firearms%20is%2010%20years.