VAT rate not showing on PDF invoice

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Hi, Hoping you can help here. The VAT rate needs to be showing on the PDF invoice to comply with UK VAT rules.

It needs to display as per the drawing on the attached. It also needs to display on each line showing the VAT rate for those goods i.e. 20% / 0%

I pretty sure I know where to insert the code but have no idea what that code should be as this would be variable by country?

Rgds