Thanks for all the responses
Don't limit your search to just 50Kw chargers then.
Realistically though we don't want to wait around for slower chargers (maybe at the destination, as I could pop somewhere on my own to do it)
Amesbury, Andover and Wincanton seem to all have 50kw chargers along the A303. Without knowing whereabouts in Surrey, it's hard to know what's around your destination though.
I did see this but with each place having only 1 or 2 chargers and judging from the Zap Map comments they are out-of-order a worrying amount of the time (hence thinking more about the motorway route with it's 4x Ionity charging station... But perhaps I'm way overestimating the demand for charging points?
Presumably not feasible to slow charge at destination from a 3pin plug? As I'd guess you'd be there more than a couple of hours if you're trekking from Devon to Surrey?
We'd be staying in an AirBnB so I suppose we could ask the owners if that would be alright, but imagine it'll depend on how close the car can be parked to the place and if they'd be happy with use using that much electricity (I could offer to pay for it of course)
I just dropped Exeter to Guildford and back again into a better route planner using an ID.3 58kwh. Without knowing the full details I can’t really do any better but it’s suggests one charge is needed for 28min.
Obviously if you need to stop earlier for the child then the planned stop is shorter. Going down the motorway gives you more options and more chargers are popping up every week.
https://imgur.com/a/pgp8LBk
Not seen that site before, interesting - I popped in some details for my specific route and id3 model I had in mind and it seemed to think there was no need to charge at all (which is technically probably correct especially if setting of from 100% charge)... Though I guess now that I think about it I'm mostly just worried about how I would charge the car back to full for the return journey, have visions of driving about to all different chargers and finding them broken down or too busy etc.