Thanks, worked for me, as said above can now redeem 950 points for 10 quid voucher, there's a few items on the site for a fiver as it costs 3.50 postage. My spend was 5.50 plus postage.
It’s been updated now, can redeem for £10 John Lewis e-gift card, just done it
I signed up for this offer with a prepaid Mastercard using the code MSE10 to get the 1000 points. The ICE representative on the MSE forums has said that due to unprecedented demand (was in the MSE email) they had ran out of vouchers (something about them expiring) but more would be on the site today. Sure enough the minimum amount of points you can exchange has increased from 50 points = £1 to 450 = £5....Still not at the 950 points for £10 but getting there. Seemingly the John Lewis vouchers are working fine and that it's just the M&S vouchers they are having trouble with. I read that you make your purchase as normal with your Mastercard and you will then receive an email with a link that will refund the £10 to your "credit card" (Mastercard). How this works for prepaid cards or other Mastercards would be something to watch.
Finally got a code. I know it says it's an online code, but anyone know if you could spend this in-store?
Yep. And when you try and spend the points there are a pile of ridiculous limitations on the number of points you can spend and how often (wait three months wtf?!)