As a car with such remarkable history, the various private owners of No.19 have striven to maintain originality and patina wherever possible. Maintenance and repair of bodywork and powertrain has been undertaken as sensitively as possible, whilst also maintaining structural integrity and safety (the chassis in particular remaining remarkably solid).

In November 2018 the Jaguar Enthusiasts' Club displayed No.19 at the NEC Classic Car show. Having had a preservation detailing beforehand the car was transported by covered transporter for the event. Unfortunately, when loaded for the return leg of the trip, the vehicle transportation firm reversed the car - whilst on the lower deck of the transporter - into the unsufficently-raised upper deck.

The original rear windscreen, with a heater matrix pattern unique to the development cars and thus irreplaceable, was smashed and the surrounding brightwork - again slightly different to that of production cars and irreplaceable - was damaged. Worse, the trailing edge of the roof was deformed by the impact and the transmission of impact forces through the nearside C-pillar deformed the alignment of the rear wing.

After expert assessment by Keith Parrington (of XJ Restorations and Painting Classic Cars), an authority on XJ bodywork, it was conceded that a bare metal restoration was unavoidable given the extent of the damage. This was painstakingly undertaken during the spring of 2019 Efforts continue to source an original (i.e. development car) replacement screen and brightwork; an XJ enthusiast in Holland may be able to source the former.

Notwithstanding the bodywork restoration, in all other regards 28G remains overwhelmingly original and unmolested. The interior and engine bay are largely untouched; and the engine and gearbox are original and retain matching numbers (in this sense the 'original' engine being the new unit fitted by Jaguar on its departure from the Test team, in readiness for private sale).