Steam Extravaganza at South Cerney near Cirencester 2011. Set on the outskirts of the historic market town of Cirencester, the Gloucestershire Steam & Vintage Extravaganza is one of the biggest events of it's kind in the South West. As the name suggests this is far more than a Vintage Rally. This is an 'Extravaganza' of all things nostalgic and precious to a British way of life. This event is for many people, the highlight of the summer calendar.