British Prime Minister Boris Johnson wants to talk about climate change. But his opponents want to focus on sleaze.

As a UN climate summit aimed at staving off catastrophic global warming enters its final week in Glasgow, Scotland, host leader Boris is facing a barrage of criticism in London over his attempts to change the system that oversees lawmakers’ standards.

On Monday, the House of Commons will hold an emergency debate on political ethics after the government tried to block the suspension of a Conservative lawmaker found guilty of breaching lobbying rules.

Opposition parties say the episode has revealed a Conservative government that plays fast and loose with the rules, and they want a public inquiry into corruption allegations.

Labour Party leader Keir Starmer said Boris should apologise to the nation and “clean out the filthy Augean stable he has created”.

The lobbying episode is the latest to fuel allegations that Johnson and his Conservative government don’t follow rules that apply to everyone else.

Lawsuits have been launched over the government’s awarding of tens of millions of pounds in contracts to provide equipment and services during the coronavirus pandemic — often in haste and with little oversight.

Home secretary Priti Patel was allowed to keep her job after she was found to have bullied members of staff. Boris himself has been criticised for accepting expensive holidays in Mustique and Spain, and faces investigation by Parliament’s standards watchdog over the source of money that was used to refurbish his apartment in Downing Street.

The issue hit boiling point after the House of Commons standards committee recommended a 30-day suspension of Conservative legislator Owen Paterson for lobbying on behalf of two companies that were paying him more than £100,000 a year.

The Commons Standards Committee said Paterson's actions were an “egregious case of paid advocacy” and had “brought the House into disrepute.”

Instead of backing the committee's decision, as has happened in all similar cases for decades, Conservative lawmakers were ordered by the government to oppose it and instead to call for an overhaul of the whole standards process.

That vote on Wednesday sparked fury — and not just from the opposition. Generally supportive newspapers reflected the anger, with the Daily Mail proclaiming: “Shameless MPs Slink Back Into Sleaze.”

The next day the government did a U-turn, saying it would look for cross-party consensus on overhauling the disciplinary process. Paterson abruptly quit Parliament after 24 years as a lawmaker.

Environment Minister George Eustice said the uproar was a “storm in a teacup” of little interest to the wider public.

But former Conservative Prime Minister John Major lashed out at Johnson, saying the way the government had acted was “shameful, wrong and unworthy of this or indeed any government.”

“There's a general whiff of we are the masters now' about their behavior,'” Major told the BBC. “It has to stop, it has to stop soon.”