I got my current gas permeable contact lenses from Specsavers. Good value (for the UK) at £100 a pair then. Oddly, they charge the same for a replacement pair as they do for fitting and supplying. Which seems wrong to me.
You do get your prescription.
So looked at buying online out of interest. And unless I'm missing something you can't from a UK supplier.
But you can from the US. Simple website ordering. Postage to the UK included - and less than half the Specsavers price (at the time - will vary with exchange rate) Even call themselves Eurolens.
So decided to give it a try.
Took about 6 weeks to arrive, and thought I may have to pay VAT and duty. But no. Perhaps I was just lucky.
They are fine. Only mistake I made was to order clear. As you really can't see them in a white case filled with overnight solution. All the UK lenses I've ever had have a slight tint - usially neutral density, or green/blue.