So at £0.1849 (GBP) (18.49 pence) per Kw/h, is it going to be worth mining again?

I stopped a few months back when the fan on a 5970 literally exploded in the housing, but I'd like to start again. I'm estimating usage at around 830watts (Very rough approx of 700Watts for 2 5970's and 130 watts for a 280).