Scotsman: THE UK has reached a landmark one gigawatt – or a billion watts – of installed offshore wind farms with the completion of a giant Scottish project in the Solway Firth. The milestone firmly makes the UK world leader in terms of the amount of offshore wind farms built off the coast. There are now 11 wind farms around the coast of Britain, made up of 336 giant turbines. The installed capacity is 1.041 gigawatts, which green energy association RenewableUK calculated is …