Flying Stansted this weekend and I had a bit of a google round to see if there were any offers going for the Stansted express train into London. Found a couple that I thought I'd share.

If you use the promotion code "FREE" you can get one free child (up to 15 years) place for each traveling adult. Details here on their website. Offer is valid until the end of October, so not too much longer, but may help someone.

If you use the promotion code "TTT09" you get a free upgrade to First class. No idea how long this promotion code is valid for, but it worked for me when I booked today.