Boden's tops seem to run TTS or slightly large. I am a 2/4 in US sizing, and wear an 8 in Boden sizes.
Pants are another story. They should be great for pear shapes, but I had some problems with them. The jeans I got in an 8 are tight. They look good but they're not as comfortable as I would like, and I get some major muffinage. The 10's on the other were just WAY too big. I ended up keeping the 8's, since they fit in the hips and thighs and hopefully if I lose an inch or two around the tum they will fit.
These are the jeans in a 10. As you can (sort of) see, they are enormous on me and look awful:
http://img.photobucket.com/alb.....G_1591.jpg
These are the 8's, reflected in my dirty mirror:
http://img.photobucket.com/alb.....G_1361.jpg