Can you be dismissed instantly after 7 months?

My daughter has been working as a manager for a company since July 2017 and has recently learned that she is pregnant. Today she has been dismissed and the reasons given are simply not genuine and have been dreamed up we believe because she is pregnant. There has been no disciplinary procedure been followed and she has been given instant dismissal without any notice. This cannot be correct and although I am aware of limited rights within the first 2 years of employment, this clearly is wrong.