Update on my woes.
I got in touch with Tag CS, who have so far been excellent.
They sent out a box to post the watch back & I鈥檝e just received the detailed technical report.
They couldn鈥檛 find any issues with my WiFi (it would only connect when less than 1ft from the router), but they have stated users on iOS 11 have had WiFi and Bluetooth issues.
Apple have released version 11.0.2 which addresses some of the issues but Tag will be in contact once a permenant fix has been released.
As for my watch falling off my wrist on 2 occasions, this was down to the lugs not being securely attached to the watch head.
I鈥檓 not sure if this is a Tag issue or an Ernest Jones issue - but either way, they are sending my watch back to Switzerland to replace these just in case, plus replacing the bezel as a gesture of goodwill (which came off as well & scrached).
I鈥檓 happy they are looking to resolve these issues and I can鈥檛 fault the customer service, so we鈥檒l see how it looks in 6 weeks when I get the watch back from Switzerland.
I have asked about the Tag companion as well to see when that is due out & what functionality it brings. If I get any info, I鈥檒l share it in this thread.
I鈥檓 glad I didn鈥檛 sell my Apple Watch now as I鈥檇 be without a smart watch for a good 2 months ! I鈥檝e got to say though, I had missed the Apple Watch functionality, but the Tag is streets ahead in style....