Mr Blunkett has repaid a sum of £179 - the then cost of the rail ticket between London Kings Cross and Doncaster - to the House of Commons
Sir Philip made his report to the Commons committee on standards and privileges on December 20 following a complaint from three MPs on November 30
The committee acknowledged that Mr Blunkett has apologised for his error and repaid the outstanding sum
Mr Blunkett attributed his mistake to an incorrect presumption that the rules relating to spouse travel had been extended to include partners
It was clear that this presumption was wrong in rules contained in the so-called Green Book
It was Mr Blunkett's responsibility to be aware of the rules of the House, the committee said
The committee has not yet decided a penalty but has been urged to consider four things in doing so by the commissioner: That Mr Blunkett admitted using the rail warrant, through his spokesman, when the allegation was first raised; that Mr Blunkett had recognised his error, apologised and repaid the sum; that no evidence of any other "instances of abuse" by Mr Blunkett of the allowances provided by the house has been uncovered; the committee should also be bear in mind the outcome of similar cases of breaches of the Houses allowances regime.