For info regarding "de-coding" the letters&numbers on the chassis plate, see
http://www.lotus-cortina.com/mk2plate.htm
Drive L=LHD
Engine P=1558cc Lotus Twin Cam engine
Trans A=floor change
Rear axle D=3.77:1
Trim code B980=black interior
Chassis number BA91HB79882:
BA=built at Dagenham, UK
91=2 door Lotus
HB=built in January 1968
Paint code BA=Ermine White
Going by the photos, the car looks original (but hard to say definately, without seeing the car in the metal).
Another posting on here mentioned the car might be from Sweden, and the seats look like they could be "Swedish" (Swedish Cortinas had cloth seat face material in the middle, + they also had a steering lock and twin brake servos as standard).
The export mk2 Lotus Cortina also had the extra plates on top of the inner wings, and the chassis number was stamped on the LH plate (when standing in front of the car, looking rearwards).
Having said that, the extra plates on this car looks like they have been MIG-welded on, originally they would have been spot welded (maybe the plates were removed, to rectify some rust damage underneath those plates, a common rot spot on these cars).