You’re only entitled to parity pay on the hourly rate, any bonuses they get such as a fuel bonus, and annual leave. You’re not entitled to parity on pension or stuff like mentioned like free drivers licence medicals.
Point to note though that if you’re a night worker, that’s anyone who works at all between the hours of 00:00 to 04:00, then you’re entitled to a free health check by your employer whether that’s a permanent employer or an agency.