O2 SIM Only: 250GB (Unltd w/Volt) 5G, Unltd Mins/Texts, EU Roaming & O2 Priority - £12/m (24m)

This O2 SIM only deal looks pretty solid. It comes with a good chunk of 5G data, unlimited calls and texts, plus EU roaming and O2 Priority perks. If you're already a Virgin Media customer, there's an extra Volt perk. This bumps your data up to unlimited, and you'll get benefits for your broadband too.