I recently returned from the u.k, using a single re-entry permit, I went online to do my 90 days reporting as I had left the country, I got a message saying I didn't have to do one yet & also didn't receive an email etc, is this correct?

When you exit Thailand the 90 day count stops. 

Upon reentry your count starts day of entry. 

So next report due date is 89 days after entry. 

You will not receive a reminder email. 

You need to report in person. 

After that first in person report you can then do online reporting. 

O.k thanks for quick reply.....