I would go further and expect JLR to meet labour cost. You are not 'partially' at fault if you have maintained the vehicle to manufacturer's specs, so why should you fund any of the cost? My suspicion is that's a try-on by the dealer, because the manufacturer (all brands) only give a specific labour time and rate to the dealer to get a given warranty job done. Seldom does the allowance give the dealer a break-even on labour.
So the dealer makes it up by attempting to charge you labour ("goodwill"). Don't fall for that one.

