I had a new Cavalier Mk 2 in 1983, which I loved. I'm pretty sure there was never an Ascona C for the UK, because I would have been extremely excited about it and would definitely be able to Bore for Britain about it. I remember being fascinated by an Ascona C I saw in France. It was a bit of a disappointment, because unlike the previous Asconas it hadn't been given its own nose and headlights. It was just a Cavalier with different badges.
Here are some Opel UK '70s ads. Ascona B:
https://i.pinimg.com/originals/10/5e/ab/105eab20f63a08393f0345833e93a7de.jpg
Manta:
https://www.pinterest.co.uk/pin/479000110361401956/
According to several posters here https://autoshite.com/topic/28414-vauxhallopel-dealerships/ there was a separate Opel UK dealer network until 1982. I can't find any photos.
Here's a combined Opel/Vauxhall/Bedford dealer, in the 80s I think
https://howmanymade.files.wordpress.com/2017/10/vauxhall-c86.jpg
I had a new Cavalier Mk 2 in 1983, which I loved. I'm pretty sure there was never an Ascona C for the UK, because I would have been extremely excited about it and would definitely be able to Bore for Britain about it. I remember being fascinated by an Ascona C I saw in France. It was a bit of a disappointment, because unlike the previous Asconas it hadn't been given its own nose and headlights. It was just a Cavalier with different badges.