Ltd Company - travel expenses question

I am an IT contractor with a LTD company and was wondering about claiming travel expenses. I know you cant claim them for working all year round for the one client as the office is your ordinary place of business but this company year I will have worked 3 months outside Dublin, 12 weeks at home and the rest of the year in North Dublin, can I make a case for claiming travel expenses for the whole year as I havent had 1 ordinary place of business all year? Can I also claim subsistence allowence for the time I spent working outside Dublin (I stayed overnight away from home Mon-Fri)?

Also for 3 months of last year I was working outside dublin and staying overnight during the week. I didnt claim any travel expenses for this in my accounts which have already been filed - can I claim them this year retrospectively and put them into this year's accounts?

As far as I'm aware you can claim civil servants rates See h[broken link removed]

You have to keep a record of milage etc

As its a limited company I'm not sure whether you can go back and claim against last years figures.

asdfg is correct, that you could cliam 'claimable' mileage up to civil service rates without prior clearance from Revenue. The claim would not be 'backdated' merely paid out this years accounts. Note asdfg point on keeping records. Any reviewer would seek to see a 'valid' claim with 'authorisation'. So it would need to be directly related to the business.