Concerning the issue of whether we are a casual worker or a an employee there is many criteria to consider for example the time we work for the employer, our skills, whether he employs us only in case of shortage or during peak time or he uses us in the normal running of our business...etc.
However I would like to know if the conclusive evidence is not when the P45 has been issued because if it has been issued one year after the start of employment this means that we are now an employee.
It is up to the employer to decide if he need us anymore or nor and as a consequence if he se