I have finally given in to the fact that I found Sandvox a much better program for maintaining my main website. I therefore bought an old iMac on which it works and will be gradually changing the website so that more of the everyday stuff will be added and maintained. The “new” version of the site, which was really version 5 and begun in 2023, was prompted by Sandvox no longer working on new Macs.
Parts of the site in recent years have been produced using Everweb and other parts are coded in php etc for which I used Coda 2 (though it has been replaced by Nova).
Therefore there will continue to be different styles used in different parts of the websites and I there is some duplication and redundancy which I will attempt to sort out.