The London mayoral candidates went head-to-head in a tech debate this week

Pick of the week: London mayoral race heats up

Pick of the week: London mayoral race heats up

A chance for you to catch up on our most-read stories of the week.

Five: Factcheck: Did TfL reveal a black hole in Sadiq Khan's fares plans?

Sadiq Khan's mayoral campaign ran into trouble this week when it was reported that Transport for London (TfL) estimated the cost of the Labour candidate's transport fares scheme to be much higher than he claims. Rather than dispute the findings, Khan suggested that TfL never made the claim in the first place. Our fifth most-read item this week investigates the rival schemes.

Four:  Not fit for work: All the times Iain Duncan Smith has got it badly wrong

Next we have a piece which looks at Iain Duncan Smith's record as work and pensions secretary. With multiple reports published recently criticising his welfare reforms, this article picks out all the things he has got badly wrong over the last few years.

Three:  Boris Johnson and the 'social cleansing' of London's estates

In third place we have an article by the Green party London assembly member Darren Johnson about research he has carried out on regeneration plans in the capital. He says that current proposals could lead to a net loss of around 7,000 social rented homes in London.

Two: Cameron prison reform speech in full

Since David Cameron became prime minister the prison system has massively deteriorated. The number of inmates has soared and outcomes are worse than they've been for a decade. So will the reforms he announced this week do enough to tackle the problem? Our second most-read item this week, is the prime minister's prisons speech in full.

One: Zac Goldsmith beats Sadiq Khan in first TV clash

In the top spot this week is a look at the first TV clash between London mayoral hopefuls Sadiq Khan and Zac Goldsmith. It suggested that for the first time in the campaign Goldsmith finally began to show some fight, demonstrating why he has a real chance of succeeding the Conservative mayor Boris Johnson.