By Elizabeth Howcroft LONDON (Reuters) -Santander will block UK customers from sending real-time payments to cryptocurrency exchanges next year as part of measures to protect customers from scams, the bank said in an emailed statement on Friday. At an unspecified point during 2023, the bank will introduce a block on all real-time payments to cryptocurrency exchanges made via telephone banking and in-branch payments, as well as online and mobile banking. From Nov. 15 this year, the bank will join other UK retail banks in limiting customer transfers to cryptocurrency exchanges. Santander custome…