LONDON : Britain's economy struggled to grow in August, setting back its recovery from the coronavirus lockdown, and finance minister Rishi Sunak was due to announce more help to slow a rise in jobs losses as a second wave of COVID-19 infections hits.Gross domestic product rose by 2.1% from July, official data showed, not even half the median forecast in a Reuters poll of economists and the slowest increase since the economy began to recover in May from a record slump.Much of what growth there was in August was down to a one-off government restaurant subsidy programme.Finance minister Rishi Sunak was due to announce later on Friday a plan to support jobs in businesses that may be ordered to close to slow a resurgence of COVID-19 infections..