If Labour do hold the seat, it will be a boost to Ed Miliband. It will add to the sense that he is establishing himself as Labour leader. Indeed, it is noticeable how it is Labour that has been making the political running in the last few days, albeit at a time when few people are paying much attention to politics.
The other thing that struck me as noteworthy was how Miliband kept emphasising that while there were three parties in the race there were only two directions on offer. This is a sign of how Labour intend to take advantage of being the only major party that isn’t in government.