Not much effort IMO!
You may need to pay for a copper line to be installed to be able to order ADSLx unless you or a friend has a 'spare' one available.
PN don't charge for the FTTP install so there's an instant saving.
They also don't require you to retain a copper line so there's another saving (but they charge a perfectly reasonable (IMO) £2.50 p/m surcharge if you don't have a landline with them), so there's a big saving on line rental.
Monthly costs are £17.49 or £22.49 p/m for 40/2 or 80/20 respectively without PN landline, and yes, that's for 'Unlimited'!
One caveat is that you can't have a TV package on the FTTP trial as their back-office systems don't accommodate that.
TIP: If you do order a PN ADSL landline and broadband deal don't enter a contract for the landline, go for a monthly deal. It may cost more per month but you won't be tied in to a landline contract so you can then cancel said landline without penalty.
EDIT:
PS don't forget it doesn't have to be a PN landline, so you may be able to find a good deal elsewhere regarding copper line installation costs.
2nd EDIT:
Although the landline wouldn't need to be PN, it would need to be BT based, i.e. not LLU.
FTTP 80/20 Mbps
Edited by Rastus (Fri 13-Oct-17 20:20:37)