Usually at the point you activate the iD Mobile eSIM in your handset, @huddersfielddermot. 

Thanks but still to receive the email?

Maybe it was delivered to your mailbox Junk / Spam folder, @huddersfielddermot. 

Have you asked the iD customer service team about this, using their online Live Chat service?

Just tell the 24/7 iD chatbot you want to “talk to an adviser” - the advisers work until 8pm on weekdays.

Hi @huddersfielddermot 

An eSIM is typically received in around an hour after the order is accepted and completed, do you have your eSIM now?

Tom