wrote

Point 3 is important particularly for detached garages used for storing
daily use vehicles overnight.

Eventually we will all be driving electric vehicles which will need
charging overnight....

Dont believe that, particularly with most in here, they'll be dead first.

I have been informed that my 80a cutout is only sufficient for charging
1 vehicle. If I want to charge two vehicles overnight, I have to have the
cutout upgraded to 100a and possibly the service Cable to the cutout.....

So a detached garage having a 3 core 25mm2 SWA cable
does not now seem excessive to put in while the trench is
still open instead of that 6mm2 or 10mm2 SWA cable.....