Parliamentary scrutiny of the highly contentious Investigatory Powers Bill is set to return to the floor of the House of Commons soon, after the committee stage of the process ended last week.

Momentum against the UK government's planned law to massively ramp up surveillance of Brits' online activity, meanwhile, has—momentarily, at least—swelled with the launch of a new campaign from a coalition of privacy activists kicking off on Tuesday morning.

The Don't Spy On Us campaign, made up of pressure groups including Liberty, Privacy International, and Big Brother Watch, will ask UK citizens to contact their MPs and urge them to challenge the IPB as the third reading of the draft legislation looms.

Privacy warriors have been demanding significant amendments to the bill, which now looks like this following the committee stage passage of Home Secretary Theresa May's controversial bid to once again attempt to bring in a Snoopers' Charter—as it's colloquially known.

During the third reading of the IPB, MPs will have the opportunity to debate the planned law, but no amendments can be made, and they can only mull over the exact contents of the bill. They will then vote on whether to approve the third reading of the bill, before it wings its way into the House of Lords.

In other words, this is the last big push against IPB before it reaches the upper house of parliament, when peers will be given the opportunity to whinge about and/or endorse the bill.

“The UK government should be leading the way in guaranteeing safe and secure communications for everyone,” said Don't Spy On Us director Eric King, who drily added: “Instead it is providing examples for dictators and across the world. When China introduced controversial sweeping surveillance powers just a few months ago its government claimed it was doing ‘basically the same as what other major countries in the world do.’ Oppressive regimes are already following our lead.”

In March, MPs voted in favour of the second reading of the Investigatory Powers Bill with a majority of 266 votes, after Labour and the SNP abstained.

Meanwhile, David Anderson QC—who is the UK government's independent reviewer of terrorism legislation, and is set to leave his post in early 2017—recently said that the bill "gets the most important things right." He added at the time: "Ministers deserve credit for devising a bill that, in contrast to its 2012 predecessor, the so-called 'Snoopers’ Charter,' is unlikely to blow up on the launch pad."