LONDON (Reuters) – Britain’s gross domestic product shrank in the July-to-September period and was flat in the previous three months, according to updated official figures that suggested the economy might now be in a recession. GDP contracted by 0.1% in the third quarter, the Office for National Statistics said on Friday. It had previously estimated that the economy showed no change compared with the previous three months and economists polled by Reuters had mostly expected another unchanged reading. The ONS also said economic output in the second quarter was now estimated to have shown no gro…