Well played to whomever typo'd the page there.
50Mb is 25 quid a month if taken with a phone line, 35 without, just as 100Mb is 35 with and 45 without, 30Mb 18.50 with, 28.50 without.
Understand the confusion but that's basically it, VM directly or via an outsourced web team messing around with the web pages unnecessarily and not proof reading. Still it's nothing major, just a price that's wrong