I switched energy suppliers at the start of the year. I've never done this before and they say if you haven't done that you're bound to save money. I used Martin Lewis's Cheap Energy Club and it seemed pretty good.
I chose to switch to EDF, which was cheaper, and under their "price promise" promised to "let you know if a competitor or EDF Energy launches a product that's cheaper by more than £52 per year".
Which is nice, but yeah, whatever.
Until today when they emailed me.
Which surprised me. Very good.