Moving home during the summer holidays is such a drag

From RICS' survey:

Activity slowed further in July, with the weak picture exacerbated by the start of the school holidays.

???

I can understand why the Homeys make up excuses like prices being too bloody high, first time buyers struggling to save up a deposit, Wills and Kate thingy, riots, bad weather, Diamond thingy, good weather, football World thingy, Olympics thingy etc blah blah, those are all reasons why people might be temporarily distracted from "showing aspiration", "getting a foot on the property ladder", and "building up capital" but aren't the summer months (i.e. June to August) normally the months with most sales and purchases?

Obviously my memory isn't what it used to be, so before some pedant catches me out, I'd better check the actual monthly sales/purchase figures according to a reliable source like HM Revenue & Customs hadn't I? Ah, right...If that chart looks a bit higgedly piggedly, we can smoothe it a bit by using a three-month moving average, in which case July and August are the peak months.