Worth noting, as I remember, that I don't think there's some pretty heavy caveats on daily commuting and such. All my claims were for a distant posting with weekly commutes so I can't remember what the details are, but bear in mind that the rules are designed for exactly that - being sent to the other end of the country for a year on a temporary posting, and the expenses that are incurred.
The devil is in the detail, as always, but HMRC do a fairly good job of walking you through it when you find the right place to look and phrases to search for.