Is it possible for invoice payment options to include bank transfer and not just card payment or direct debit?

Hello Hjd, 

Welcome to the Community page, 

In custom form styles if you put your bank details in there (edit>content>3rd box). It will then show up on the invoice for you. It is then up to your customer how they then pay either by card or bank transfer or you can set up a standing order or DD. If not using a 3rd party provider then i advise to go to the cog wheel>accounts and settings> sales>online delivery and then change to plain text as this will then remove the review and pay option for you.