As long as you were looking out of the window, maintained VFR cloud/vis minima, flew 300Nm and landed at three points, you’ve done what was asked. How you navigate is up to you. You don’t actually need to write anything unusual in your logbook, although pointing out the distance will help anyone checking your logbook (the CAA don’t usually need to see it anyway if you apply online) and A lot of people seem to think they have to be solo. In your case you pre-planned to go there and encountered problems, so you used available aids to re-route, all perfectly normal (read: normal navigation procedures). But why do you keep mentioning a diversion? Did you land somewhere you didn’t intend to?