Covid, USA, tests, Baffled, please help

[Lotusgone]

We fly to the US, from the UK next month, for a ten day holiday in Florida. We are both fully vaccinated & boosted.

The guidance has us utterly, utterly confused. The US Embassy guidance says we need tests that are supervised - in person or realtime online. Other test providers suggest you don't need this as long as you can provide a certificate with the three conditions satisfied.

We could dole out hundreds of pounds, but could someone take pity and let us know, with the least jargon necessary, what we need?

With thanks in advance. And apologies if this has been done to death before.

[Lotusgone]

Many thanks to all who contributed information. We will probably go for the Express Test option on the Monday as we are staying at a local hotel the night before flying out on Tuesday 8th.

[Lotusgone]

Since starting this thread, I would like to thank everyone who has posted useful information.

Last night I uploaded the NHS Covid passes for me and Mrs L, to the Eurotunnel website with no problems. Looking forward to when this issue becomes obsolete.