Acas as per Rio would be the best bet. A company can't unilaterally change your contract but if the nature of the role/companies business changes they made decide they need to change your contract. The only way for them to do this without your agreement is to terminate your employement then offer you the new contract. They would have to ensure that the dismissal was fair and that would be what any tribunal would look at. Very few companies comply with the statutory dismissal procedure though which is a shame as its there for everyones protection IMHO. Information and communication go a long weay to alaying anyones fears doesn't sound like you are getting a lot of either so understandably you may be concerned. Anyway back to my day job which is this ironically!
