Virgin Money stopped my card after data demand

I refused to answer a questionnaire and then my cards were blockedMy wife and I were migrated to Virgin Money credit cards last year after Virgin severed ties with MBNA which had previously been its card provider. Recently, Virgin wrote to us demanding disclosure of sensitive information such as our salaries, proof of identity and proof of source of funds that we use to pay our credit card bill.This is the first time in 20 years a credit card provider has sought such personal data, and the fact