Having done some research on UK employment law, there are some things which an employee can do in this situation:-
1) Reject the terms given for the termination of contract by the employer (yes, an employee can do this, it is a two way process with the employer);
2) Appeal the decision if there are reasonable grounds to do so (the appeal meeting has to be done by a more senior manager than in the termination meeting);
3) Make it clear to the employer that the employee is available to work until a final decision is made by the employer, meaning that he/she remains on the payroll until the appeal meeting has been completed.
Also, an employer cannot treat an employee less favourably than anyone else, otherwise it becomes a breach of trust and confidence between the relationship of the employer and employee in question, and a case for constructive dismissal may be made by the employee.