Where can a Limey watch this with English subs?

A bit late to answer, but Google D-Addicts. They have torrents of quite a few fan-subbed J-Dorama, including Orange Days. Hopefully it's still being seeded - it was a fantastic show! I found it by accident - I heard Sign (the great ending theme by Mr Children) on either Japan-A-Radio or one of the JPop stations on Live365. A search for a copy of the song led me to the show (which in turn led me to some other J-Doramas, such as Densha Otoku and Gokusen).

Good luck!