Soldato
According to the guy I spoke to I am only charged £20, I did ask if it was still only £20 and he said yep (as apposed to £50 - £20 for engineer + £30 for activation)
I just checked my bill, it's £20 activation + £30 for the installation.
So it looks like they are not charging the install. I was initially told that it was free install (under the free installs promo as an install waas required rather than a speed upgrade which was a config push) then I got told I would be charged it after all.
I might kick up a bit and see what happens. They already messed this bill up as it's missing a referal £30 I was just waiting for it to be paid before I contacted them