Because I googled the text that lally quoted and it led me to the article. This one. https://finance.yahoo.com/news/refused-home-covid-test-credit-001600037.html... and how do you know that non UK residents without leave to remain are the ones getting the tests and not being rejected because they don't have credit histories?
Let's face it you're just trolling now.
Google yourself if you don’t believe me or ask @ellal to link his sources in future so that we can see the whole story and not just the selective quotes he puts up.