Thanks for your reply Simon. I'm really not technical so when you say remove one of the jquery instances you mean delete one of the files right? I've removed /includes/templates/westminster_new/jscript/jquery/jquery-1.10.2.min.js

Under CSS/JS Loader Configuration, I put the values of Minify CSS and Javascript to False.

It hasn't seem to have made any difference as I still can't input any data into the credit card fields.

Site is https://bit.ly/2HdFdVO if anyone wanted to have a look

I'm stuck!