www.parkers.co.uk - you can search by car or insurance group, a search for group 1 cars gives the following list;
Citroën 2CV6 (81-90)
Citroën C2 (03 on)
Fiat 126 Hatchback (87-92)
Fiat 126 Saloon (77-87)
Fiat Panda (04 on)
Fiat Panda (83-95)
Fiat Seicento (98-04)
SEAT Marbella (88-93)
Skoda Fabia Hatchback (00 on)
Vauxhall Corsa Hatchback (00-04)
Vauxhall Corsa Hatchback (03 on)
Vauxhall Corsa Hatchback (93-00)
each are links on the site, and link to different models (obviously a top spec, sports corsa will be a higher group than the basic model).
Hope this helps