LONDON (Reuters) -British supermarket group Sainsbury’s followed market leader Tesco in warning of lower profit for the current year due to soaring inflation, taking the shine off a more than doubling in profit for its 2021-22 year. Sainsbury’s said on Thursday its underlying profit before tax in 2022-23 was expected to be between 630 million pounds and 690 million pounds ($789-$864 million). The group made underlying profit before tax of 730 million pounds in the year to March 5, 2022 while analysts on average had been expecting 703 million pounds for 2022-23. “The year ahead will be impacted…