Wuka claims to make comfortable and completely leak-proof period wear for the UK. 

Wuka

Health & Wellness

Underwear

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I love my WUKAs! Recommend them to everyone with a period that I know. Have got 8 pairs which is more than enough but sometimes I scroll on the site just to dream....
Originally got these as a gift for somebody else, who really enjoyed them, and then decided to try them out. I used to use a cup as I loved "not feeling like I was using a period product" but these go one step further. The only context in which I now choose my cup over my WUKAs is... when I've run out of clean pairs. Seriously. 
I have tried their classic pants as well as some of the ~cuter designs and have no complaints - the fit is nice and snug, you cannot see them through clothing, there is virtually no smell even on heavy days, and the surface stays nice and dry. They are so absorbent it usually takes me minutes to rinse them out until the water is clear! 
The original 3-pack I bought has been fail-proof for the past 3 years and I don't think it will need replacing for another couple at least. Love. And the pricing is unbeatable. 

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