Exactly the same was reported last summer post-election. It also happened the previous year, though not to such an obvious extent. Everything goes dead in the summer anyway. Properties that were listed in early spring and haven't sold by the summer hols get reduced; not many people list their property for the first time in August... And the number of buyers looking appears to drop as people traditionally go on holiday in July/Aug.
We put our London house on the market last year just before the election, quickly realised our mistake (and that there was nothing to buy!) and pulled it off, but nothing around us that came on in the 2 or 3 weeks before or afterwards shifted at all and they either cut prices to sell over the summer or lingered until November when everything started moving again. We waited until January this year before relisting. Obviously if you need to move for whatever reason, you don't have the luxury of waiting and so cutting prices is your only option to sell quickly.
I'd take the articles with a pinch of salt and if I was looking to buy right now, I wouldn't assume that there were bargains to be had - I'd be looking very closely at how long the property had been on the market. I do think the market needs a small correction, certainly stabilisation at the very least, but I think that the fact that the Brexit vote was so recent we don't know full implications and the usual summer lull combine to make this too early to call a definite fall. If we get to next Easter and we have quarter-on-quarter drops in price and volume, that's significant, but I'd be sitting tight on a wad of cash right now - unless, of course, I saw somewhere I really wanted to live for a few years that I could afford.