My Bohemian uranium glass seccessionist bowl with SP rim

Hi,
This is a very nice bowl I purchased at an Antiques fair recently for just £20. A few years back I had purchased a small vase with the same pattern for less than 50 cents at a local boot sale . I loved it especially when I checked it for uranium at home, the vase glowed brightly which really brought out the design. At the time I tried hard to find out the maker but failed badly. So when I saw the large bowl I just had to buy it. I still have no idea where it was created and hope someone here can help.
The bowl measures 8.5" in diameter and just under 4" tall. The silver plated rim has a maker's mark S & B plus EPNS. I have discovered that this maker is The Company Slack and Barlow of Sheffield England who specialised in cutlery but also worked on bowls just like this during the 1920/30s. Which seems about right fit this item.
Many Thanks,
Bryn