The Kodansha Learners Dictionary has all the Jouyou kanji and some more besides. As such it's good for learning about the individual kanji. Where it might be weak is in the combinations of kanji. ( but then I'm more used to electronic dictionaries where the problem sometimes is too many entries.)
For example, while you can look up the individual characters in 興味深い you might not find it as an entry under any of the kanji. (I've just checked actualy it is listed but only under 深)
The reviews on Amazon. --well I think I know the one you're talking about but that guy likes to use a Chinese dictionary to look up Japanese kanji so he's way beyond KKLD.
If you go here you can see example pages
http://www.kanji.org/kanji/dictionaries ... arners.htm
As you're in London go into the Japan Centre or the Basement of Mitsukoshi and have a look through the dictionaries to see what one you like if you're going to buy a paper dictionary. Both stores also have Japanese manga, although not as cheap as YesAsia. They are authentically shrink wrapped so you can't browse them. You can find (nonshrink-wrapped) childrens books in Mitsukoshi though.
Another place for Japanese books in London is Adanami Shobo on Brewer Street. A small shop full of cheap 2nd hand books. Again the manga are shrink wrapped and not current but they're cheap, and the nearest you'll get to Book Off outside Japan.
Japanese resturants around Picadilly often have free Japanese language papers if you want to try your hand at them. No furigana though.