GiffGaff will give you £5 free credit when you top up a new SIM with £10 or more. You can get a SIM here:- giffgaff.com/orders/affiliate/julieshort
Once you receive your SIM you can choose to have a credit balance and "pay as you go" in the normal sense
or
You can choose one of GiffGaff's excellent Goodybag deals which last a month and include free stuff during that month. As in free texts and minutes, you just choose how much data you want.
And if you want 5G, then GiffGaff can give you that too, with the Golden Goodybag choices.
To get yourself a GiffGaff SIM use this link:-
Honesty section
I get £5 bonus credit when you join.
You will get £5 credit.
We both get to enjoy GiffGaff's fixed UK prices for 2022.