Maybe they've changed things. Was just lateral flow on return for me last week. This week and it would have been PCR and isolate until negative result. Website says you need I.D. and that swabbing will be done by them. https://www.expresstest.co.uk/preparing-for-your-test/I did my fit to fly via post and paid extra for courier, an extra £10 I think - yet these people will wait what 30mins in a queue?