 a COMPaNY that built one of Britain's first wind farms two decades ago has landed a key role in australia's flagship ?3.2 billion renewable energy programme.  Wind Prospect, based in Bristol, is part of a consortium that will build a 250MW solar power plant in Queensland. Output will be supplemented with a gas-fired boiler so that the plant can deliver yearround reliable power for 70,000 homes.  "This is the biggest project we have worked on," said Euan Cameron, Wind Prospect's chief executive. "You often see the combination of solar farms and gas-fired power stations in California, but this can run at 250MW solar or gas, which makes it a p 