London Diary Passport Vouchers. Why pay cash on arrival  when you can just hand in a voucher. You will have eleven vouchers with no expiry date that can be used anytime at any of our locations around the country .  Send the vouchers as a gift, share vouchers with family, friends and work colleagues.  Buy online by pressing card images below.  A booklet of eleven salsa class vouchers valued at £77 to buy press the card image