Please do tell me where the Health Protection (Coronavirus, Restrictions) (England) Regulations 2020 - ie the law - allow you to
ferry the aircraft to obtain essential maintenance
They dont. Section 6 sets down specific reasons you can leave the place where you are living. Any other reason is illegal no matter how worthy. Maintaining an aircraft is not included. The CAA has set down its position but their position is subservient to the Regulations. They cover maintenance of aircraft which are allowed to be used under the Regulations.I can take my car in for maintenance because I need it to drive to my ITU where I work. I suggest I cant take my XK120 which I race as a hobby for maintenance....