Three other possible improvements:
Since it is necessary to disconnect the battery when leaving the vehicle unused for a few days, especially if one has the immobilizer (which I did not order or want, but the car mysteriously arrived with it), I would like to be able to disconnect the battery more quickly. The system on my 1932 Austin 7 (no, I did not buy it new) was far better.
It is rather surprising, as others have mentioned, that the 'boot' (I think of it as 'the glovebox') is not waterproof. Apart from that, it would be useful if the insert could be removed more quickly - with a maximum of four screws to undo - for rapid access to the stuff beneath.
I'd like to have more modern front wheels, in spoked light alloy, something like the OZ Cattiva R, fitted with tubeless tyres.