Exactly. Along with taxis, diesel vans are another huge contributor that must be prioritised. They're some of the dirtiest, most polluting vehicles - and many

Exactly. Along with taxis, diesel vans are another huge contributor that must be prioritised. They're some of the dirtiest, most polluting vehicles - and many are on central London streets constantly making deliveries, etc. It would make sense to focus subsidies on getting these guys into electrics/hybrids first. Each diesel van off the road has a much bigger impact on air quality than, say, getting Grandma a subsidised Nissan LEAF.