Yes I can although other than the wholesaler I mention in Portugal, I’m not sure how easy they would be to get hold of in the UK. I’ve stopped directly importing because now you have the issue of getting hit with duty and VAT which has reduced the cost advantage. Of the very many I tried, the below were favourites.
Quinta do Portal
Quinta dos Aciprestes
Both were their ‘basic’ wines, I was buying for less than £10 delivered, though they would be more in the UK. They also do reserva and grande reserva wines. These I’m sure are even better but also pricier and the basic level was very pleasant.
Higher up the scale, you have the legendary estates like Quinta do Vale Meao and Quinta do Vesuvio. WS has the Vale Meao but it’s £75! I can’t afford that. Both do ‘second’ wines, respectively Meandro do Vale Meao and Pombal do Vesuvio and both are very good, around £12-15 when I bought them from Portugal. There is more chance you might find these in the UK (maybe slightly more expensive than I quote).
You can also get 100% pure Touriga Nacional, the main port grape. Quinta do Vallado do a good one but it does need a bit of time, I had their 2017 last Xmas and it wasn’t ready.
A word on vintages. My couple of years of exploring Portugal’s wines co-incided happily with the availability of 3 excellent vintages, 2015, 2016 and 2017. If you can, get wines from these vintages. The 2018 is above average but not as good as the above.