Central England Pre-1980 Vauxhall Rally - Two events again this year in April and August.
I took my Viva to one of these last year. It's a small informal gathering on a pub car park between Stourbridge and Kidderminster - if you're in the West Mids area. Last year most types, from F type Victors to HA Vivas to Carltons and Royales, were represented.