Hello Tom (and Frankie) I just noticed you posted this question yesterday elsewhere on the site and got a direct reply from Jordan, one of our Cloud engineers https://moodle.org/mod/forum/discuss.php?d=340972#p1374275
In future it would be better if you can keep to one posting as it just fragments the help you receive
(The 'just in' from MoodleWorld was probably taken from Jordan's reply and our Moodle.com blog post yesterday (meet the lovely Fred DIxon on there )