An employee has been in an organisation since end of September 2003 and is intending to hand in his notice in the next few weeks.
He will have been employed for 7 months and has no contract.
He is paid monthly.
What is his notice period?
I think its 1 week yet someone else in HR states it would be 1 month due to him being employed longer than 6 months??
Anyone clarify this for me please?

Thank you
Kay Mellanby