Hi,
My name is Dom Weldon and I'm a freelancer based in Cambridge in the United Kingdom. I'd love to work on this project with you, as it seems like an interesting challenge, and could get it completed very quickly. However, beforehand I need to make sure it's possible to add an email address to the form without altering the code in any way on the original page.
Am I right in guessing this is a third party service that the user is going to? If so, could you tell me which service it is so I can look at their documentation? One alternative is to setup a "go-between" page which has an identical form on it then submits the form so the user goes straight to the second page, but this would be quite complex. Either way, if you could send me the URL that the user has to visit it would be really helpful.
Hope to hear from you soon,
Dom