I filled out the timeline page today based on dates in his service files. He has two separate sets of files - one from WW1, and another from WW2 which actually includes the bulk of his WW1 files. It appears that most were transferred to his WW2 file when he was in the Home Guard.
In looking through his files, some dates may appear to differ from those on the timeline. The WW1 entries often had two dates - the date of the event, and the date the information was recorded. I have tried my best to use the context of the whole file to determine the correct date, but some may well still be incorrect.
None the less, the timeline gives a detailed insight into a short period in his life.