Are you taking about the SmartThings Labs list
If not then can you provide a link to the community list providing its a UK product list
thanks
There isn’t an all knowing list that I know of. You could check out the community created thingsthataresmart.wiki but I don’t think they have a UK vs us compatibility page and even this list probably doesn’t have half of the community created options.
But the reality is that if what you want to connect is zwave, zigbee ha, or has an open api the odds are it could be integrated.
SmartThings Labs are official integrations being worked on by SmartThings staff, they’re just not fully baked yet.
There isn’t really a list of all the available unofficial integrations, although it would be nice if somebody would make one.
Instead, the way it works is that community members work on device handlers for their own purposes, or just because they think there’s a new device which is really cool. When they have something that they want to release to the full community they put a topic in the category of the forum that specifically for that purpose. There is one subcategory for smart apps and one subcategory for device handlers. Developers usually Mark whether their efforts are at the “Alpha,” “beta,” or “release” stage.
The topic allows for questions and discussions of the code. The code itself is usually in the author.'s Github, and normally is referenced in the first post in the thread.
“Device type” and “device handlers” are the same thing – – SmartThings has changed the terminology from time to time.
So you can just browse that category, or do a forum search for specific model that you’re interested in.
https://community.smartthings.com/c/projects-stories/community-created-device-types
Usually if a Z wave device has both European and US models the same device handler can be used for both, although that’s not always true.
As was mentioned, we also encourage authors to add a section to the community created wiki, but it’s still fairly new and not everybody has done. But at least it’s easy to search. 
http://thingsthataresmart.wiki/index.php?title=Category:Unofficially_supported_devices
So I’m afraid there’s no simple answer to your question, but there are some good places to look.
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Somfy blinds are not officially supported but they are available in many countries (and in our old Washington DC office: Somfy Motorized Blinds (Z-Wave)). They are expensive but high quality shades… Might be worth investigating to see if you can find a compatible model.