Major service due on my Range Rover, where to go?

[simregistration]

My Range Rover Velar is due for its major service and I have been putting it off because I am not sure where to take it. The dealer quoted me a number that honestly made me laugh out loud and then another garage near my place said they could do it but when I asked what oil they use they gave me a vague answer which worried me. I am looking for quality Range Rover servicing around ICAD because I work nearby and can drop the car off in the morning and pick it up after work. Has anyone here used a workshop in that area for their Range Rover and been happy with the result? What I want to know is whether they actually follow the proper service schedule or just change the oil and stamp the book. Also do they use genuine parts or decent equivalents because I do not want cheap filters that cause problems later. How much should a major service cost roughly for a Velar because I have no idea what is reasonable. If you have a trusted place please share because I am tired of guessing and I do not want to go back to the dealer.