Hi Alex Murton, no this is still a discount off the shipping amount, what I'm after is a fixed shipping rate that replaces the shipping value. Or 100% off + the fixed rate of x, if you want to do the maths that way.

Hi @pPatrick Kennedy - we have a new shipping discount under "discounts / GWP" where you can choose a % of fixed amount - see here: https://gyazo.com/258f262857a3e931944560b7ef3ced9d

Have a good and let us know if this works as desired.