Originally Posted by
southlondonphil
Have these been coded into the system for use online yet or are we still going to have to call the helpdesk in order to use them?
How do you use a voucher?
Once you receive your voucher via email, call our contact centre and quote the voucher code to use it. Call volumes are extremely high at the moment due to the unprecedented circumstances so please bear with us if it takes some time for us to help with your booking. Thank you for your understanding during these challenging times.
This hasn't changed on their site as of now, so I would say you still have to phone.