This would be unfair dismissal and the person would be able to take the employer to an industrial tribunal. The employer would have to have a good reason to have the employee redeployed or dismissed. If it is a simple personality clash, then sounds like this emploee is being bullied by the majority of the work force. Things like sending one to Coventry, shouting, threats, abuse, intimidation, humiliation, excessive criticism, overruling / undermining, etc, can all be seen as forms of harrasment and bullying.