What is JotForm?
JotForm is a free online form builder which helps you create online forms without writing a single line of code. No sign-up required.
At JotForm, we want to make sure that you’re getting the online form builder help that you need. Our friendly customer support team is available 24/7.
We believe that if one user has a question, there could be more users who may have the same question. This is why many of our support forum threads are public and available to be searched and viewed. If you’d like help immediately, feel free to search for a similar question, or submit your question or concern.
I'm not sure about the legalities of digital signature in England. But I assume that they should be in accordance with the law. Based from this reference, they have the Electronic Communications Act, 2000 and The Electronic Signatures Regulations 2002 that tackles digital signature.
We also have a new digital signature widget that you can use, the Adobe DC eSign services. It allows users to sign documents electronically. It's widely accepted and used around the world. The Adobe eSign widget allows you to turn your jotforms into signable contracts. Users can affirm their agreement by adding their signature right within their browser.It will automatically generate a completed copy of your form, open the generated document in Adobe Document Cloud where your form users will securely sign it. To learn more about the widget, you can click the link above.
I hope this somehow helps.