LONDON—A surge in fraud attacks on consumers since the pandemic has become a ‘national security threat’ for Britain requiring government-coordinated action across industries, banking industry lobby group UK Finance has warned. Financial fraud has rocketed during the pandemic as more consumers shop online and try digital banking and investing. Criminals stole 754 million pounds ($1.03 billion) through bank frauds in the first half of this year, up 30 percent on the same period in 2020, according to a UK Finance report published on Wednesday. Bank losses from authorised push payment (APP) fraud—where a customer is tricked into a payment by a criminal—also leapt 71 percent in the first half, overtaking the amount stolen through card fraud for the first time, UK Finance said. Lenders have been pushing for tougher action on fraud by the government, regulators and other industries including online platforms exploited by fraudsters to target victims, as they …