Editing the sign up action page text

Hi
I would like to edit the page that is shown once the sign up process is completed. When Signing up as a student registration is free so no payment gateway is active.

This is the url I am taken to -
http://www.students4work.co.uk/sign-up/?action=registeruser&subscription=1

This is the text I would like to edit - Please check the details of your subscription below and click on the relevant button to complete the subscription.

Many thanks
Mark