Vodafone has added more models to the Smart line up in the shapes of:
Smart 4: http://shop.vodafone.co.uk/shop/mobile-phone/vodafone-smart-4-black-payg
Smart 4 turbo: http://www.vodafone.com/content/index/about/what/devices/smart4turbo.html
Smart 4 power: http://www.vodafone.com/content/index/about/what/devices/smart4power.html
All are now in the shops, but Vodafone's woeful website has not been fully updated.