How to add store address to invoice email

Question

We would like to show the store's address at the top of the invoice email which is sent to customers when they place an order. Specifically, I would like to insert the value from the Invoice and Packing Slip Design section in the admin panel because this section can include the VAT number.

How can I insert the sales/identity/address value into a transactional email template? I have tried using the following variable but it comes out blank:

{{sales/identity/address}}

Answer 1

Magento init variables for invoice email here:

Mage_Core_Model_Email_Template_Abstract::_addEmailVariables

You may rewrite this method with this class Mage_Core_Model_Email_Template