Will the Conservatives’ current housing policies survive a leadership battle?

While Ms May was using her conference speech to scrap the borrowing cap for council housing, Mr Johnson was telling a fringe meeting about a family in a damp council flat in Wolverhampton he met in his early days as a journalist.

“It was a terrible scene. They were sitting there and with the heating on full blast and a baby crying, and the condensation dripping down the window, and there were these great black spores all over the wall. The chap was in his socks in an armchair and in a state of total despair. He was worried about the baby’s cough – which was getting worse,” he explained.

“The council wouldn’t do anything, and he felt he couldn’t do anything – because it was not his property, and I could see that he felt somehow unmanned by the situation. And I felt very sorry for them both – because they were total prisoners of the system.”

Incredibly his solution to all that was the Right to Buy. He added: “I thought what a difference it would make to that family if they had been able to take back control – to coin a phrase. To buy that flat.”

Mr Johnson faces competition for the top job from a crowded field and I’ll return to the leadership race in a future blog.

For the moment, it’s enough to note that the contenders include former housing secretary Sajid Javid, former housing minister Dominic Raab and former shadow housing minister Michael Gove.

Further down the list, Liz Truss has been busily positioning herself as the most pro-market Tory in the race. She’s called for radical reform of the housing market to attract the “go-getting generation” of younger voters and for the Tories to “stop bottling it” on planning reform that she claims could cut housing costs by 30%.

However, other candidates will see her call to “take on” the vested interests opposing development in the green belt as exactly what the Tories should not be doing if they want to appeal to suburban voters.

Their arguments will have been reinforced by the results of the recent local elections, in which opposition to housebuilding plans was one factor in the success of independent candidates.

And that brings us back to the general election that a new prime minister may see as a way out of the Brexit impasse.

Some indications of what’s at stake came in the result of the Australian election over the weekend in which Scott Morrison’s coalition won a surprise victory.

Negative campaigning over Labor’s policies on climate change was seen as a key factor in the result, but housing was also an important issue in the campaign.

The coalition had few policies of its own but announced an Aussie version of Help to Buy (funded by guarantees rather than equity loans) for first-time buyers in the final week of the campaign that Labor felt obliged to match.

“You could see the Australian election as a re-run of the UK in 2015”

Labor promised a series of reforms including the halving of a capital gains tax discount for landlords and the abolition of negative gearing, the Australian system that allows landlords to offset losses on the homes they rent out against taxes on their other income.

You would have thought that would play well in a country that has seen house prices rocket and homeownership fall as landlord ‘investors’ rushed to take advantage.

Instead, the coalition concentrated on attacking Labor’s plans, claiming that they would damage property prices and increase rents – and that strategy seems to have worked.

Lessons on elections in Australia are usually absorbed pretty quickly in this country thanks to the ubiquity of the Rupert Murdoch press and the fact that Australian political consultants like Lynton Crosby have been prominent in campaigns for both the Australian Liberals and UK Conservatives (with mixed success).

The 2017 general election campaign was a disaster for the Tories, which Ms May and Mr Crosby reportedly blamed on each other.

That meant that a classic negative attack from Boris Johnson on Labour housing policy in the final week of the campaign had little impact. He claimed that tentative Labour support for a land value levy amounted to a ‘garden tax’ that would triple the council tax bills of middle-class homeowners.

Would this type of assertion get more traction next time?

You could see the Australian election as a re-run of the UK in 2015, as right-wing incumbents threw everything into promises to boost homeownership.

But you could also see it as a dry run for an election here, whether it comes in the next few months or not until 2022.

Jules Birch, award-winning blogger