Certainly do the above, but at the end of the day the employer can enforce the change by dismissing workers who won't agree to it. It is very likely that a complaint of unfair dismissal can then be made to a Tribunal & the employer may have to pay compensation, but the amount is limited & you still end up without a job. Tough if it works out this way, but best you are warned.
However, I wouldn't try to deter you from taking this up & attempting to get the changes modified. In my view, no. 3 (training costs) is particularly obnoxious & these may well be something it is arguable the employer has a duty to pay if the training is in any way related to health & safety requirements. Certainly, get ACAS advice & see a solicitor specialising in employment law if you are able to find one giving limited free or low cost advice.