I am confused.

If you have a Lloyds Avios credit card, and the avios is transferred to your Avios account monthly, then you should have an Avios account (standard). In this case, your Lloyds avios will be transferred to a BA executive account in future.

If you have an AerClub account, but your Lloyds Avios credit card is issued in UK and your billing address is in UK, then theoretically you will have a new BA executive club account for future use.

If you have a log-in username and password for Avios.com in UK then you are a member of Avios travel rewards UK regardless whether you have an AerClub account or not.

Otherwise you will have to call Avios.