LONDON—Britain’s coronavirus-hammered economy grew more quickly than previously thought in the final three months of last year but still shrank by the most in more than three centuries in 2020 as a whole, official data showed on Wednesday. Gross domestic product (GDP) increased by 1.3 percent between October and December last year from the previous three-month period, the Office for National Statistics (ONS) said. That was stronger than an earlier estimate of 1.0 percent growth as the ONS received more data in recent weeks. Economists polled by Reuters had expected the growth rate to remain at 1.0 percent. In 2020, gross domestic product fell by 9.8 percent from 2019, only slightly less sharp than an initial estimate of a 9.9 percent slump. Britain’s economy suffered the biggest drop of all countries in the Organisation for Economic Co-operation and Development (OECD) except for Argentina and Spain last year, OECD data has …