Eu Customs Duty €3 on multiple items

If like me you have had trouble working out why you are being charged more than the flat fee of €3 for multiple Identical items through Royal Mail & was getting so frustrated trying to work out what had gone wrong on checkout
Here is the simple answer that solved my issue

If your items all have the same tariff code & Each item was listed individually on a separate line on the customs form

Delete all individual contents boxes down to one
and add the quantity of however many items are in the box eg .3 items
add the weight and your good to go

The fee then goes back down to €3 🙌🏻