On 4 November, CMS Law published this guide designed to provide guidance on the law governing electronic execution of deeds and documents in all UK jurisdictions, and on the practicalities of engaging with e-signing platforms.
https://cms.law/en/gbr/publication/electronic-signatures-e-signing-platforms
I had omitted the following link (as it did not seem to generate much interest!), but it seemed time to add it again and say that, if you would like to make a (polite) gesture and help me with my removal and computer costs, I have a page at https://www.buymeacoffee.com/KoIvM842y