No doubt about it. They are beauties. But the new Thomas Heatherwick-designed buses cost a fortune and will now be discontinued. The first 600 vehicles purchased in 2012 by (former mayor) Boris Johnson cost £354,000 each, while the next 200 in 2014 cost £325,000 each. London’s new mayor Sadiq Khan first suggested his plan to discontinue the buses during his own election campaign, as a cost-saving measure to help pay for a four-year freeze on fares.