Rules change tomorrow. The word essential doesnt seem to apply. If you fly for sport then it is allowed. If you go for a jog round the destination airfield on arrival it is allowed. If you fly for any sort of work or the aircraft is used for work then you must try to fly. Indeed Boris's exhortations on sunday night suggest your maintenance organisation needs to pressurize you to fly so they can get work
It is all total confusion, and I am following Matt Lucas as he is clearer than Boris. But being serious, the new confusion means most people can take whatever interpretation they prefer. Hope the virus behaves.