Here's the legal bit needs updating

[#1]

At present it completely ignores the £2.50 discount for home phone as it is the same on the Broadband Only and Broadband + Phone pages

[#2]

The 'here's the legal bit' is the same across all pages.
I can see that it currently states "If you take Plusnet Home Phone along with one of our Essentials or Unlimited packages (broadband or fibre broadband), we'll reduce your broadband price by £2.50 for as long as you keep your phone line with Plusnet - Find out more about our packages."

[#3]

failed to spot that - must go to Specsavers