OK, yesterday I went through the Pre-Approval Registration/Application process for the COE, on line. For those who haven't yet done it yet, the link is below.
After filling in information and uploading the relevant/request documents (drag and paste), I received an email from the Royal Thai Embassy, confirming that they had received my Application and at the same time advising me of, my six digit code number.
Didn't have to upload any proof of a Hotel Booking or Flight Booking at this time. I only had to state what date that I intended to arrive in Phuket, which must be 30 days or less from the date you make this Registration/Application, or it will not accept it.
Went back into the system late today, to "Check the Result" and is say "Under Approval".
System is easy to use and all positive so far
Now, just have to wait a few more days, as it's a weekend here.
I am guessing that once the approval process is completed, the RTE will send a second notification email.
LINK: Registration/application on https://coethailand.mfa.go.th