Vauxhall Astra 4S was only used on one event which it finished 2nd in the Audi Sport Rally on the 11th October 1986 in the hands of Andrew Wood and Mike Nicholson.
The groupB Kadett 4S actually even started one rally, the British national Audi Sport Rally, where Andrew Wood finished 4th behind 2 Ford RS200 and a Metro 6R4. This event was in October 1986, 2 months before the ban of groupB