There is a widespread text phishing campaign in progress at this very moment. You may get a text that looks like it comes from the NHS, telling you you have been in close contact with someone who is positive for Covid and that you should get a test kit to check your status. The kits are free, however once you get to the fake NHS website, you have to pay for postage and that is where the scammers collect your payment and other personal details. A similar message is circulating on Twitter.
NHS warns of scam Covid-test texts – BBC News
The NHS never ask for payment details in it’s communications.