The secondary router solution works well. I do that (though we use a Bouygues 4G box until our fibre is "soon" installed), with a router flashed with ExpressVPN, then log my Apple TV into that wifi network and access our US based content providers. Alternately, you could see if there's a streaming hardware platform that will give you access to the UK providers you want and that has a VPN app. I know that the Amazon Firestick 4K has an ExpressVPN app available, which also works well. As a bonus, we have a smart TV and connect it directly to our Bouygues wifi (French IP address), so that we can also log onto streaming providers "from " too. You get the best of both worlds that way.