I would like to have a British sim card for identification purposes mostly, e.g. registering on food ordering services. So I do not want a subscription and pay monthly. I would like to buy some gigabytes and only top up when I used that. I have found this page:
https://kenstechtips.com/index.php/best-payg-sim-for-low-usage
In theory, these are pay as you go, but the fine print contains expressions that go to the direction of auto renewal, or that the plan is for one month only, or monthly rolling.
Is there a real prepaid sim card in Britain?