Labour and covid 19 restrictions

Does anyone from England/UK know what the current covid restrictions are? I mainly wanna know how many birthing partners will be allowed and if my birthing partner will be allowed there upon my arrival or only when I'm in active labour?

More info: my main birthing partner is gonna be my fiance who is fully vaccinated (I donno if that makes a difference) and my mum will be my second if I'm allowed one. She's also fully vaccinated and has had her booster.

I'm 35 weeks so I know things may change before I give birth but I could in theory go into pre labour at any time.

Thanks.