They seem to be mildly successful with one or two other products, so their existence might not be in immediate danger... I'd really like to see the slider phone product line continued, though, but the chances for that look a bit dim at this time.
As for cooperations with Fxtec, another British company comes to mind which doesn't produce phones (yet?), but another niche product, Linux laptops: Star Labs (https://de.starlabs.systems/). Even though they must be a rather small business, too, they have very nice products, sensibly priced, excellent support, and it looks like their commercial