I seem to have screwed-up following the walkthrough at https://www.sslforfree.com/
(I entered iceled.co.uk as my domain and manually uploaded to acme-challenge directory - but the walkthrough mentioned two files to upload while I only got one - maybe this was something to do with the problem?)
The problem is that it sort of worked but I only have secure access for iceled.co.uk but not www.iceled.co.uk (except on Chrome which I understand generously allows for this). I read that the cert should cover both with and without www (and that it has to be deliberately turned off as an advanced option and I didn’t do that!)
If I want to go through the process again, how should I proceed? I wasn’t sure if I should revoke or delete this cert first.