So I did not believe the nice lady at Google so I emailed them instead. After getting elevated to technical I got a response saying the following:
When items are purchased in the UK you will receive the UK power adapter. I can certainly understand how confusing it can be the way you see the information provided to you on Google Play, but rest assured that you will receive the proper power adapter.
£11 delivery sucked the fat one, but I can confirm this is true as I received the charger yesterday
Just in case anyone got put off buy Google's miss information.