For sport.. Power in UK on average around £0.155/kWh..
My lickle S17 eats around 2.6kWh.. So an hour of mining = £0.403..
1 day of mining = £9.672..
154 days of mining = £1,489.49..
Just need a 0.23BTC share of this next block to break even..! :-D
COME ON BLOCK YOU'RE BECOMING A PAIN IN THE BUTT.
And that's not even taking into account paying off the capital costs/shipping/VAT of buying the miner in the first place.
Mining in the UK is a lost cause really.