on 14-10-2021 15:00
on 14-10-2021 15:23
You can get one here, @Fabiano https://www.o2.co.uk/shop/sim-cards/sim-only-deals?cm_mmc=googleuk-_-PPC_Direct_Simplicity-_-Simplic...
Do remember, if your current SIM was lost, report it to O2 so you are not liable for calls made in it in the interim - numbers here: Guide: Coronavirus Community Help and Support - call around 08:15 any morning.
on 14-10-2021 16:37
No need to buy a new contract, just call O2 or pop in store with ID to get a replacement sim card.