Hi Roy,
JRW 581V was a press car, well Daily Express had there grubby hands on her for an article 3rd March 1980 so every chance 580 was.

And she is still alive somewhere -
The vehicle details for JRW 581V are:
Date of Liability 01 08 2014
Date of First Registration 02 01 1980
Year of Manufacture 1980
Cylinder Capacity (cc) 1997cc
CO2 Emissions Not Available
Fuel Type PETROL
Export Marker N
Vehicle Status SORN Not Due
Vehicle Colour WHITE
Vehicle Type Approval Not Available
Cheers John


LIVE LIFE A QUARTER OF A MILE AT A TIME!
1976 Speke FHC Beauty
1979 3.5 FHC(STATUS PENDING!!)
1982 2.0 DHC NOW A 4.6, BUILT NOT BROUGHT !!!!