OK, I’ve got the solution. My confusion was created because, and anyone using uk2 will be vaguely familiar with this, is that there is a chi login and then a cPanel. The cPanel apparently has a password, but you don’t actually need to enter it, only for chi, so I assuemd the ftp password is also the chi password, as this gives you acccess to the backed of your website.
But the cPanel password is your ftp password, and to (re)set it follow these instructions:
Step One: Navigate To The Shared Hosting Section of CHI
Log in at chi
Click on the “Shared Hosting” tab as seen in the icon below.
Click the domain for which you would like to reset the password .
Step Two: Use The Change cPanel/FTP/SSH password Tool in CHI
Click the “Change cPanel/FTP/SSH password” button as seen in the image below.
2. Enter your new password in the field provided and confirm by entering the password again.
3 Click “Save” to implement your new password.
Thanks to everyone who tried to help.
Have a great day.