Martin Lewis has opened a thread in his forum where merchants can post a MSE specific discount code. There are some interesting deals on there, and some less interesting, but it's been running only 39 hours and there's 8 pages!
I posted this here because although they are voucher codes, it is not merchant specific.
Perhaps someone with a little more time on their hands could collate the deals offered in this thread?
I had a good search but couldn't find any reference to this, or any rules regarding linking to MSE so I do apologise if I'm doing something wrong.http://forums.moneysavingexpert.com/showthread.html?t=1234627