Tough job..
Since Tony Blair invited Bill Gates & Co to take over the ship there have been aggressive political plays to prevent any return to sane use of government money (not in the least by consultancies who make a lot more money from development and maintenance of Microsoft based projects than they will ever make using Open Source, which is where part of the stubborn resistance is coming from - all IMHO, of course). I reckon whoever takes up this challenge better ensures they wear a stab proof vest to protect their back.
That being said, the situation is not entirely hopeless but to illustrate the nature of the job, just check how far the adoption of ODF as document standard has penetrated into government. If it was a love affair, this amount of penetration would be commented on by the phrase "is it in yet?"...