The fronts of the 5- and 10-pound notes issued in 2019 have the legal clause “Ulster Bank Limited / promise to pay the bearer on demand … at Head Office Belfast / For Ulster Bank Limited.” The designs unveiled for the 20-pound note (B941a) originally scheduled for introduction on 20 July 2020 also bear the same legal clause.
However, on 14 February 2020, the Royal Bank of Scotland Group, which included the National Westminster Bank, Royal Bank of Scotland, and Ulster Bank, was renamed NatWest Group. Due to this name change, the legal clause on the 20-pound denomination will be changed to “National Westminster Bank Plc, / trading as Ulster Bank, promise / to pay to bearer on demand … at Belfast.” It is unknown if the bank printed any 20-pound notes with the old clause. Notes with the new clause will be issued “in the near future,” which some sources cite as October 2020, but given that the notes are dated 1 March 2021, a later introduction date is more likely.
Courtesy of Christopher Nield.