"(or, if more than one, the principal reason) for his dismissal"
"It is not necessary to decide whether the requests made by the Applicant for a contract of employment amounted to an assertion of a statutory right because Mr Kaumaya's reason for dismissing the Applicant was his conduct and attitude (including the making of requests made for a contract of employment) but that it was his conduct that was the principal reason for the dismissal."
"The principal reason for the dismissal of the Applicant was not an assertion of his statutory rights nor the fact that a protected disclosure had been made."