The headline may be blunt but the truth is simple. The Lib Dems want to pretend that they can oust Andrew Selous - but they've never come close to defeating the Conservatives here.
This chart shows the maximum percentage that Labour and the Lib Dems have ever achieved against the Conservative candidate in a general election. As you can see, Labour has come within a single percentage point of the Conservative total, back in 1997. Labour even got within 4% at the following election in 2001. Compare that with the Lib Dems, who have never polled higher than 40% of the total Conservative vote!
The lesson from this is simple: If you want this Tory government out, your only choice is to vote Labour.