You need to talk about swings because they are the most relevant way of looking at results. The tories do not have an overall majority, so what % of swing is needed to give Labour a 50 seat majority. How does that particular swing stack up against swings in the past where the sitting govt's popularity has fallen sharply, only to recover in time for the election? That is the correct way to interpret the significance of these results, as they show how much ground the tories have lost in the last year, how much ground they would have to make up to win an election, and how this pattern compares to the past.
You can bet your arse that this is the way tory and labour strategists will be looking at this data. Do you think this is not the right way to look at it? If so, why? If not, why did you not talk about swings in your post?
I'm asking for a bit of rigour in your use of statistics, that's all. Given that you are a statistician, I don't think that is too much to ask.