“Amazon local” have a national UK deal on for a free £2 voucher for their MP3 service.

You need to order the free voucher by 23:59 Saturday 19th October. Any unusued credit on the voucher will expire by Saturday 26th October.

The link to get the voucher is:

https://local.amazon.co.uk/National-UK/B00FKTVZY6

You need to give them a credit card, but nothing is charged.