Toyota is committed to hybrid technology as well as fuel cell developments - it will launch a fuel cell vehicle in Japan in 2003 - and has launched a four-wheel drive hybrid version of the Previa in Japan.
Toyota GB chiefs say about 1,000 Prius cars have been sold in the UK since launch a year ago - about half the expected number.
However, a spokesman was optimistic for the Prius's future sales prospects: 'Prius technology is going into other vehicles and as time goes by the hybrid technology will increasingly become a part of the model range.
'We are not disappointed with UK sales. The Prius represented a move into uncharted territory and we need to convince customers. We believe sales will get a kick-start as a consequence of next year's company car tax changes.'