Making my WordPress a live site

Hi

I am in the process of replacing my static website based on crummy HTML and CSS with a better one, using wp as a cms. My website is at https://www.jonnysutton.co.uk my wordpress was installed into a folder called photography, so I originally could work on the new site without taking the old one down.

Now I wish to swap sites so I changed the wordpress settings to say that wordpress was installed at https://www.jonnysutton.co.uk/photography and the site is at https://www.jonnysutton.co.uk I then pointed my domain at /photography instead of /.

Everything broke!
I am guessing that what is happening is the wordpress install is now at https://www.jonnysutton.co.uk (as this is the photography directory) and looking for a /photography folder which doesnt exist. How do I fix this as the admin module is no longer available with a broken wordpress! I do have ftp access though