It's a Vauxhall Wayvern / Cresta, I had one may years ago, you had to be careful when entering the car as you could bang you knee on the inner door pillar, these cars were also prone to rust under the N/S Rear passenger seat.
There is a house just up the road from me that has at least 13 cars in that state and to my certain knowledge they have been there since 1976 when I first moved here. The council say they can do nothing as they have been there since before the SORN law came in.
I've taxed worse looking cars. The '79 Viva that cost £50 immediately springs to mind. No two panels were the same colour and cruising round town with four 17 year old lads in it, REM and cannabis smoke pouring out of the windows we wondered why the old bill were always giving us a tug.