What is the law full process for dismissal from employment?
It depends on the reason for dismissal. If it is work performance related you should have at least received one written warning before it happens. Check out your company disciplinary procedure, they will need to follow this to the letter if dismissing you. Notwithstanding the above, if you have less than one year service and there is no element of discrimination, there is little that you can realistically do.
All decent employers will have a disciplinary process written down this should be made available to any employee. There is a law regarding how it should be done and most places dependant on what you are being disciplined for will follow the verbal written and final dismissal route, but it must be done fairly and employment tribunals like to see that the employer has given the employee every opportunity to correct whatever was wrong and that dismissal was the only solution.