The squirm that turned: How Andrew Mackay was shamed by Bracknell voters

Tory MP claimed most of his constituency was on his side – well see for yourself in this extraordinary video

If, as the Sunday Times was predicting at the weekend, more than 200 MPs stand down at the next election, this is the video that will explain why. It's footage from the meeting Andrew Mackay held in his Bracknell constituency on Friday night – before he announced the following day that he would be standing down.

Do watch it. (Or at least some of it. You don't need to sit through all 20 minutes to get the message.) You've probably seen voters venting their fury on politicians over the expenses issue already (as they did on Question Time, when Margaret Beckett was on recently).

This is different – and in many respects much worse. The grilling is sustained; the critical questions never seem to stop coming. But what's really awful is that, by and large, the audience is so polite. They are not angry freaks desperate to make it onto the TV news. They appear to be reasonable, moderate (and mostly Tory) people who just happen to feel utterly betrayed by someone they used to admire.

It's a political decapitation, English-style. I suspect that many other MPs will watch it, and find it absolutely terrifying. It could be one of the most revealing pieces of Westminster video you'll see all year.