Thanks for the info thus far.
Beags, that was the one bit of the Inland Revenue site that I did manage to understand - but from what I can work out all duty journies apart from postings count as necessary business rather than commuting.
GlosMikeP - is the 8p per mile x no miles a typo? Should it be 18p or have I got it wrong?
I currently don't file a tax return (not paid enough rather than avoiding!) - will I have to file a return and claim it back through that or can it be done on a separate form? Have heard all about the hassles of tax returns, and quite happy to avoid them for as long as possible
Regards.