A nine-strong jury – including Rab Bennetts and Grimshaw’s Chris Nash – will meet next week to decide on a winner for the long-awaited King’s Cross Square competition.

Stanton Williams, Gehl Architects, Gustafson Porter and Gross Max remain in the frame for the high profile project to design a 7,000sq m public space – larger than Leicester Square.

But it has emerged that two firms - Field Operations and Martha Schwartz Partners - have dropped out since a six-strong shortlist for the £6 million scheme was announced more than a year ago.

The judging panel is headed by Jim Cornell, former executive director of the Railway Heritage Trust.

He will be joined by representatives from English Heritage, Network Rail, Design for London and The London Development Agency and Camden and Islington councils.

The new square will be in front of King’s Cross station’s grade I listed facade, and will be used by up to 100,000 people each day.

The international competition, run by Malcolm Reading, attracted more than 100 entries when it was launched in 2008.

The square is scheduled for completion in 2013 and is part of a wider regeneration scheme for the station being carried out by John McAslan & Partners.

•The first of three new bridges over the Regent’s Canal, part of the 27ha King’s Cross Central redevelopment in the hinterland of the station, has been installed.