I have XF Sportbrake 3-0 S 2014 purchased in 2015 full Jaguar service history currently undertaken by a registered Jaguar Service Centre , post last year service (2022) was advised the timing belt and high pressure fuel pump belts were scheduled for renewal ( Jaguar recommendation) cost of the renewal including Jaguar Silver service £1396 the vehicle has covered 41000 mls from new. Following the recommendation I had the works undertaken ,a fellow cricketer who works for a local Jaguar Main Dealer told me they frequently change the belts and under visual inspection look as good as the day they were fitted . You pays your money .