I believe
danieleither is in the U.K, and he most likely doesn't mine at a 25 cents Kwh rate, so hopefully, he can chime in and help point you in the right direction to get a proper power rate.
Indeed I do not, however I am in a unique situation which unfortunately won't last forever. Eventually I will need to ship my equipment to be hosted abroad somewhere. I wouldn't dream of mining at $0.25 per kwh.
There are places in the states that will let you host with just 5 miners, that would be worth considering if you can get around $0.06 - $0.07 per kwh. Obviously the more miners you have to host the better electric rate you are likely to get, or you'll find that some hosters will give you a better rate if you buy the miners through them first.
If you really do want to mine in the UK, it 'may' be worth considering mining something other than BTC, as there are some options which are much less dependent on a cheap electricity rate to give good profit.