At the top of Giffgaff invoices there is a thick black bar with the reverse print lettering - GiffGaff the network run by you.-
This serves no more use than being a trendy design. When I print out my VAT invoices, the black alone bar consumes a very large amount of ink due to the print area it covers. My ink at my expense. Even on low resolution print settings it saturates the paper enough to make it go wrinkly behind the black bar.
Could the graphics designer of the template behind everyones invoice, please remove this black bar and simply have the header in normal print. It will reduce the amount of ink we are all having to use when printing our invoices.
Simple and obvious observation, combined with the economics of running my self employed business.