(GMMF1.NET) Bernie Ecclestone will not be satisfied until there are more than twenty grands prix on the F1 calendar. The 74-year-old supremo said 2005's unprecedented scheduled of 19 events 'is a pretty good start. ''But we're not finished yet. ''We've got Istanbul now,'' he added, ''and we're working really hard on Russia. I think we can manage twenty or twenty one (races), can't we?'' Race number 21, he revealed, could be a city grand prix, perhaps in London. ''Or Vienna,'' he chimed. Ecclestone continued: ''Imagine it — a big city, a grand prix car winding between historic buildings. I think people would like that. I would.''