I realise I'm a bit behind the game, as the rules have changed again. However, I spent a few days in Paris a couple of weeks ago, travelling by Eurostar. In order to do this I had to have proof of being doubly vaccinated, and fill in a passenger locator form. This form required a unique number from a LFT taken and recorded within two days of returning.
What my bugbear is; we originally ordered the LFT from the NHS (free), but on further reading I found that the NHS tests weren't approved by our government for this purpose. So we ordered 'Government approved' LFTs from a list, which cost £18 for each one. The lateral flow tests were the exactly the same as the NHS ones [Flowflex,made in China I think], so why the heck are the NHS ones not on the government approved list for travel outside the country? Or do I maybe know the answer to that?