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Using a vpn you can also watch both Netflix UK and Netflix USA on the same user account.
As you want to use the VPN on multiple devices it is best to connect to the VPN at the level of the router, so any computer or iphone which connects to the wifi will automatically get a UK ip address.
If you are good with computers you can get routers for only 20 euros which can connect to a VPN but first you have to change the firmware (the software which runs them) to a version which can run as a VPN client such as DD-WRT or tomato. This is all very confusing and is for tekkie orientated people.
A router which can connect to the majority of VPNs straight out of the box is the ASUS RT-N16
It costs about 77 euros: Here is a link to buy it at Amazon. http://www.amazon.co.uk/dp/B003HAL4ZA?_encoding=UTF8&camp=2506&creative=9274&linkCode=as3&tag=751 (http://www.amazon.co.uk/dp/B003HAL4ZA?_encoding=UTF8&camp=2506&creative=9274&linkCode=as3&tag=751)
Once you get the router use this tutorial to configure it.