There are none so blind as those who cannot see........
http://www.modernliberty.net
Don't rely on National Officers of the TU movement. The work is being done by many many grass roots members who are slowly but surely embarrassing The National Officers into action. Through working with other organisations such as NO2ID, joining in at conferences organised by the likes of 'The Convention on Modern Liberty'. Keep telling the Union hierarchy that you are against it and want them to do something. Refuse to accept any other answer from them.
Stop waiting around for someone else to do the work for you.
If Prospect are actually saying as you quote. Then they actually need people to remind them who they serve. Believe me though, it's not just a Prospect problem...

It doesn't matter who they serve or which properly constituted union it is they have no choice. They can campaign as much as they like using legal means until it becomes law. Once it is law and a requirement they can't advocate breaking the law as to do so would leave the union and its officers open to legal redress. They also have a duty of care to their members so although they might offer support if you chose to face up and refuse to have an id card they can't suggest such action or condone it because you might subsequently decide to sue them when you're out of work and the House of Lords and European Court turn out to be unsympathetic.

The only people who think this is a good idea are a handful of senior Civil Servants and Cabinet Ministers. Unfortunately they have the majority to push it through and by the time of the next Government they will have commited so much public money to the project that the next Government of whatever colour will have little choice but to carry on as they'll need the income from issuing the cards to pay the contarctors.

At the moment it is not law to have an ID card. The Unions are not doing anything constructive because they are getting favours on other issues from the Government. There is a lot of Horse trading going on.
Besides, If they had the will they would carry on regardless of it being law or not. Sometimes we have to remind our TU's that they only exist because brave people resisted the law.
If this had been Tory legislation the dinosaurs at the top would have been on the streets by now.
As for the trials. The unions at MAN and LCY now have reason for a dispute with their employers. The employers have signed up voluntarily to the scheme. Therefore, the members there have be co-opted in by the employer against their wishes.
The Unions will come on board...Late....due to sheer pressure from the members.
Amazingly, the TUC are out and out against ID cards. The whole situation beggars belief.