Last night co-editor of Lib Dem Voice, the “independent website for Lib Dems”, Mark Pack wrote a post about Luton South in which he made some rather good points;

“If a party’s leader visits a constituency it doesn’t hold three times…

… in the space of a few months, it’s a pretty big clue that the party believes it has a strong chance of winning – and almost certainly has polling or canvass data analysis to back it up.”