The number 0208 1545 711 connects to card services for a PFS Prepaid Mastercard account. Essentially these are bank cards, with funds added by a local council, that are sent to benefit recipients.
PFS Prepaid Mastercards are managed by a company called EML. They assist local councils in the UK to provide card services to recipients of benefits in the UK by managing payments. The number 0208 1545 711 is a customer service number that holders of a PFS Prepaid Mastercard can ring in the event of a lost or stolen card.
Note that EML were previously called Prepaid Financial Services.