Yes. Email invites have been sent to all maintained schools and academies. The invite will have been sent to the email address(es) registered against the school in GIAS (Get Information About Schools). This is usually an office@, admin@ or head@ email address. A school can download its entry on GIAS to check which address will be set to receive the invite.
If they cannot find the original invite, schools can visit the Manage Training government website and generate a new email invite to the address they have registered with GIAS or email continuing-professional-development@digital.education.gov.uk for support.