Got an email and I confirmed on their website. Booked one to check and it is absolutely free with the below conditions! Not sure if available on other route but worth checking!
Thousands of free seats between Swindon and London.
Yes, thousands and yes, free. Select your journey and check the calendar to see where we have free seats on services available. Book and travel before the end of July.
Did you know we travel from Swindon to London direct 9 times a day and our fastest journey time is just 1 hour 45 minutes. And if you're jetting off this summer then we can take you direct to Heathrow Airport in just 1 hour 15 minutes, 8 times a day.
• Free journeys available on services between Swindon and London
• Journeys are one-way and available online only
• Book and travel before 31 July 2014
• Free fares are Amendable (fees apply), and non-refundable
• Maximum of 4 per booking
• Offer cannot be used in conjunction with any other offer
• Subject to availability
• Coachcard discounts do not apply
• National Express General Conditions of Carriage apply, which can be found at http://www.nationalexpress.com/conditions
To use our Low Fare Finder just select your journey and click Go to see the fares available. Click your date of travel and we'll show you a choice of coaches to book.