Hi Alex & Helen,
I trust you're both keeping well. The update from the design team is as follows: "We have a selection of different templates and styles to choose from and you can customise these with your own style sheets. Because the address and other such related information are compulsory for an Invoice, it is currently not possible to move the logo section, but this is something we can look into going forward." -- David M. (2014).
I will therefore convert this post into an idea and based on the number of votes it receives, this will determine the level of priority it is given in terms of being implemented.
I thank you for your patience thus far,
All the best,