Organisers of an independence rally in Edinburgh tomorrow have claimed it could be one of the biggest demonstrations ever seen in the city with predictions more than 100,000 people could take part.

Some independence supporters have suggested the total could rise as high as 250,000 in the light of the political turmoil at Westminsters and Boris Johnson's troubled premiership.

The march from Holyrood to the Meadows, organised by All Under One Banner (AUOB), will include an attempt to create a mass 'human saltire' and is expected to be joined by around 400 pro-independence bikers.

It is the culmination of months of demonstratikons in faviour of a second independence referendum and is being billed as the last big rally of the year by AUOB. Previous marches have taken place in Glasgow, Aberdeen, the Borders, Oban, Ayr and the latest one in Perth last month.

“We’re probably going to see a lot of people from across Scotland who’ve been to those other demonstrations making the effort to come here,” said AUOB founder Neil Mackay.

His prediction of between 100,000 and 250,000 people would make it one of the biggest rallies that the capital has seen.

Mackay said the 21st event organised by AUOB would certainly be its biggest, adding the “current political climate and Westminster chaos” has “built momentum” in the independence movement.

The march, leaving from Holyrood Park at 1pm and walking up the Royal Mile and over George IV Bridge to finish at the Meadows, will be presented by comedian and activist Janey Godley.

Those travelling into the city are being advised to plan ahead to avoid disruption.

Edinburgh City Council and Police Scotland said they had plans in place to deal with the high numbers of people on the streets.

A council spokesperson said: “The safety of the public is of utmost importance to the council and we have worked closely with organisers, Police Scotland and other partners to agree a route and conditions for this march which aim to ensure its smooth passage through the city.”

Police Scotland said: “A comprehensive policing plan is in place and we continue to liaise with the organisers and the event will be policed appropriately.”

There are no special measures in place to cope with high numbers travelling to and from the capital, and Scotrail will be running normal services.