The majority (60%) of homes in larger towns and cities do not have access to off-street parking, and are thus unable to charge at home, even if the majority of properties, over the entirety of the UK, do have it. Where are the residents in these 60% of homes expected to charge their cars (especially as they naturally want to pay only at domestic or near-domestic rates)?
None of them are going to consider buying an EV until they know where they can safely, conveniently and economically charge it on a regular basis. Charging infrastructure needs to be put in place - or at the very least needs to be seen to being put in place over large swathes of the land and in all regions - BEFORE any mass switchover to EVs will, or even can, take place.