WWE is offering a 3 month trial, normally it's only for 1 month. This will allow you to watch Royal Rumble and Wrestlemania. There is also a bunch of old PPVs to watch.
You'll have to sign up using a UK address. Just Google for a Subway, Pizza Hut in England.
Subscription can be cancelled at any time online.
Note, there is a authorisation fee 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.
Thanks mate! Good deal with Wrestlemania coming up.