LONDON (Reuters) - British power producer Drax Group Plc said in its full-year results on Thursday it will end coal power generation at its North Yorkshire plant, ahead of Britain's 2024 deadline.Drax, which has the capacity to provide electricity for around 13 million homes, has converted four of its six former coal-fired units in the past decade to use biomass wood pellets.Although almost 50 years of coal-fired electricity generation at Drax power plant is expected to come to an end in March..