Worked perfectly, thanks to both of you !
It is also now sometimes coming up with the page of code error on chrome whilst using windows. So the issue is no longer confined to mobile browsers.
Tried setting it to the admin email address, the same as in the wordpress settings.
When the form successfully submits, I receive notification, and it appears in the responses section. When the form doesn’t successfully submit – and the page of code appears, there is no trace of it.
I can’t work out what causes the form to not work, doesn’t seem to be any reason for it, but of course this is an issue, as I can’t have my contact form sometimes not be working.
