Back in 2015, Jaguar Norwich and Nottingham were both possibly part of H.A. Fox, which sold out to the Inchcape Group a couple of years later.
Transfers of cars within the same group would be pretty normal. If the first owner was Jaguar Norwich it was probably used as a demo to make it VAT qualifying which then allows the option of onward sale/lease to a business as a used car.
My current car was pretty much the same scenario, registered by Jaguar Peterborough and owned by them for 6 months before being sold on via business lease as VAT qualifying. This was on an AE plate, rather than an O plate as it wasn't a central Jaguar Fleet car.
As SimpleR suggests, give the dealers a call. They looked mine up and gave me the background to it, that it'd only been serviced with no other issues notes.
A 'trader' will not usually count as a keeper/owner, so the car will show as 2 keepers until someone buys it even if it passes around the trade for months