[mattlondon]

They are actually hybrids - they have a petrol range extender IIUC

Also, the old terrible diesels still have lots of time left where they are allowed on the road.

Taxis are awful at lining up outside entrances to stations (e.g. kings cross and at pancras) and leave their engines running as they slowly slowly creep forward picking up fares. There are often 20 or 30 diesels basically just idling right outside the main entrance to major stations.

[jeffwass]

Mentioned this above but taxis are not allowed to idle their engines waiting at taxi stands. You can kindly ask them to turn off their engine (most do without argument).

Or you can also take photographs and report them to the TfL.

[stuaxo]

I didn't realise these are hybrids (the exhaust is hidden), any idea how the emissions compare to the old ones.

Even as hybrids, I guess the engine can run more efficiently, only runinng as needed and never idling so it must be a win.

[cjrp]

Yep, they get about 80 miles from the battery and the rest (~300 miles) using the range-extender.