Re-direct not working

Hello,

Once the form is submitted I am trying to get it to redirect to a thank-you page to allow me to use Google analytics correctly which is not happening currently. The form in question is http://kervinandbarnes.co.uk/contact-us/ and should then redirect to http://kervinandbarnes.co.uk/contact-us/thank-you/

Currently this does not happen and instead when the form is submitted it comes up with the confirmation message and the url changes to http://kervinandbarnes.co.uk/contact-us/#wpcf7-f77-p78-o1

In the additional settings of the plugin I have the following code: on_sent_ok:"location.replace('http://kervinandbarnes.co.uk/contact-us/thank-you/');"

I have tested on an older version of plugin on another site (http://www.nowinnofeeedinburgh.co.uk/) and it worked fine and does not work in the current site.

Thank-you

https://ww.wp.xz.cn/plugins/contact-form-7/