BRUCE Crawford did his best. The former SNP minister and potential Presiding Officer was at his most reasonable when he appealed for MSPs to treat one another kindly.

“I implore all of us who take part in this great debate from across the parties in this Parliament, let’s lead from the front and show respect for each other’s point of view,” he said to applause.

A nice thought, but the first half of the two-day debate on whether Holyrood should have the power to stage a second independence referendum was steeped in rancour and division.

If there is to be new plebiscite, it is clear it will be far uglier and angrier than the last one.

In the key vote before the first referendum, MSPs unanimously agreed in November 2013 to pass the required bill.

There was no such consensus yesterday. It was trench warfare.

From the moment Nicola Sturgeon stood up to speak, opposition MSPs tried to throw her off her stride by make interventions - a trick later reciprocated by the SNP minister Kevin Stewart.

The whole basis for the proceedings was questioned, as the SNP and Greens were accused of lacking clear mandates and ignoring the will of the people three years ago.

The pro-UK parties tried to put a question mark over the final decision, which is non-binding, pointing out the SNP government has ignored a series of awkward votes against it of late, yet now holds up a vote in the Scottish Parliament as the pinnacle of democracy.

There was also a slew of insults. One SNP MSP said there was a gang of social media “abusers” on the Labour side, while a Tory likened Ms Sturgeon to “a fanatic”.

Some say the first referendum was a giant party. The next looks like the monstrous hangover.