Monthly pricing on Infinity is now the same as their ADSL2+ products
Erm, no. The quoted Thinkbroadband article is misleading unfortunately. That article is about a promotional offer package for new customers only and includes a "Evening & Weekends" calls package.
Pre-existing customers of Infinity had their monthly price increased
to £26.80 as from 3 December 2011. At least that is what happened to me, since I have Infinity Option 2 with the addition of an "Anytime" calls package that costs extra on top of the broadband service.
Every day, ...... is another day