I see that they propose to allow plug-in hybrids (which people often omit to plug in) until 2035 but, it appears, the self-charging hybrids won't be allowed. Given that the latter provide, for most users, a 20% or more improvement in fuel economy they are an attractive intermediate solution.
There still seems to be a big hole in the electricity generation capacity on a dull and calm winter's day until such time that there is sufficient new nuclear capacity to provide for such events. Then, given that nuclear is best left running except for the periodic inspection and maintenance, it's likely to result in a load of excess wind capacity on the days when the wind is blowing.
Of course, the other use for all those EVs with big batteries is to act as electricity storage. A fully-charged large EV battery could supply basic houseold needs for several days (although the heat pumps will change the energy requirement). It just needs to car manufacturers to build in a 230V socket for taking power from the car.