I thought this sight was really interesting as I work in the market research area in the UK. The blog is relevant and up to date, plus they have a huge selection of research reports to see, some of which are for free.

The website has quite a lot of info on there, so I usually go straight to the blog or market research reports if I am looking for certain info. I also got a free quote for a client of mine, they were quick to get back to me and the quote was very reasonable.