Not that I'm aware of Mark. The Steam link comes with a universal adapter so it's for a multitude of markets (in fact, working out how the hell to put the UK bit on the adapter was probably the only onerous thing about the product for me, I have bursts of stupid, it's my thing. I got mine from Game btw).
I use mine wired to a 8-port network hub, which my PC is also hard-wired into, this hub is then going directly into one of the ports on the Sky router. I initially experienced quite fluctuating quality of stream, but fixed that by going into the options of the Steam Link and forcing 1080p (and every other setting that said quality first). It works perfectly (I'm exaggerating a tad there), apart from one time it dropped connection in the middle of a game of Heroes of the Storm (which had me dashing into the other room to pick up the game on the main PC). I've also noticed when changing screens on Stardew Valley, rather than a smooth fade to black and fade back to display, it gets a little "noisy", for want of a better description, doesn't affect gameplay in any way, but it isn't a perfect reflection of playing directly on the PC. This "may" be due to my using a freesync monitor at 144hz and streaming to 60hz? maybe? Like I say, no game changer in any way shape or form, just something I noticed.
I hear they work really well with powerline ethernet, but my experience of those is intermittent packet loss. I used to lose my Mumble connection quite often when using them, which is why I went hard wired. Having said that WoW and other online games experienced no difficulties with powerline ethernet, it was just my chat client.
If you are hovering over the buy button and they're still 16 quid, click now, I'd be surprised if you were disappointed, they're a very decent bit of kit for 16 notes, even if they aren't perfect (though I have no big complaints about mine)