Three months access will allow you to watch the Royal Rumble and Wrestlemania.
You'll have to sign up using a UK address. I used the Pizza Hut in Manchester.
Subscription can be cancelled at any time.
Note, there is a authorization fee charged (I got charged 1£ when using PayPal to pay). Below is from the WWE website after you've successfully signed up.
If you notice a WWE Network transaction on your bank card, please be aware that your bank may have placed a temporary authorization on your card that may look like a charge. This is not an actual charge and will be reversed within 7 days. It is placed there simply to confirm your billing information - you will only be charged by WWE Network after your free trial is over.
I've downloaded the app, logged in with my details and now watching NXT.
Good call, NXT is really the only good thing left to watch.
And Chronicle: Ambrose.