I have an annual 1st gold card.
Just before Christmas there were a number of delays and cancelations on the National Rail system. I have placed three Delay Repay requests and two for not providing the First Class service I paid for with First Capital Connect the train operator.
They have sent me one Voucher at present for £34.72, I anticipate getting further Vouchers for the other delays.
I do not use the rail service other than for my commute so would have to keep the Vouchers for a year until/if I renew my Gold Card.