Long delays and heavy cost overruns at the 504MW Greater Gabbard offshore wind project have taught an "expensive lesson" to engineering, procurement and construction (EPC) giant Fluor, and developers Scottish and Southern Energy (SSE) and RWE Npower Renewables.. The project was due to have been completed last month, to take its place as the world's biggest offshore wind farm until RWE's Gwynt y M ô r project off Wales is ready in 2014.