Terrible service from Apple. Battery showing health as 77% so Genius Bar appointment made in Aberdeen in order to replace battery. Told that the watch had failed a diagnostic test with a fault re compass not detected. Only option given was to buy new watch or get battery and repair done for £300 approx. I declined both options and went home where I did some research and found the Series 4 does not have a compass. I then spent over 1.5 hours on the phone and eventually a lady in Singapore assured me I could get the battery service for £95 at Aberdeen where she made another Genius Bar appointment for me. On this second appointment I was told that the watch was not supported any more due to its age (6.5 years) and that it could not be serviced with a new battery as the parts were not made any more. I had made 2 trips from home totaling 5 hours and was refused any compensation by the manager. The Watch app on my phone still states that servicing is available for my watch. It would appear that the left hand doesn't know what the right hand is doing.