A spokeswoman for developer Argent said the company had decided not to return a form as it "no longer considers the project to be a regeneration scheme". The last year saw the opening of the new University of the Arts campus on the site, as well as the completion of the new concourse at King's Cross station.
To the north-west of King's Cross, developer Quintain's Wembley City project is also missing from this year's list, having declined to complete the form. In May 2011, Quintain was granted outline planning permission for 1,300 homes on the project. A spokesman for the Victoria Way project in Ashford in Kent also declined to complete the form.
The Leith Harbour and Granton Waterfront projects in Edinburgh also fell off the list this year. Craig Torrance, physical development and investor support officer at the City of Edinburgh Council, said: "Unfortunately, both projects are undergoing a remasterplanning and are not ready for inclusion in the 2012 list."
The retail-led Preston Tithebarn project also does not feature in this year's listing. The project collapsed following the withdrawal of anchor tenant John Lewis, with a Preston City Council spokesman saying that the project was "no longer financially viable".
The Bridge Dartford, an employment-led scheme adjacent to the M25 orbital motorway also declined to submit a form, while representatives of the Westfield Bradford shopping centre scheme were not able to submit a form in time for our January deadline.
Several other schemes were unable to submit forms ahead of our final deadline. They were: Scotswood in Newcastle, the Edgar Street Grid project in Hereford and the Rochester Riverside project in Kent.
Several major schemes are now eligible for inclusion in the listing but only became so after the January closing date for entries. We expect these schemes to be among those making the running in 2013.
Outline planning permission was granted in late March for the regeneration of the site of the Solent Enterprise Zone in Hampshire. Plans for the area include significant new and refurbished employment space and homes.
Permission was also granted in March for the previously stalled Friar's Walk retail scheme in Newport. Queensbury Real Estate is now taking forward the project after former developer Modus went into administration in 2009.
While Peel Holdings' Wirral Waters scheme made it into this year's listing, the company's Liverpool Waters development was only granted outline planning permission in early March and hence was not eligible for inclusion. The regeneration of Stevenage town centre also missed out, with outline planning permission granted in January.
January also saw permission granted for a 1,850-home development at Llanilid in Glamorgan in south Wales. The Crown Estates' 580-home Nerrols development in Taunton received outline permission in December.
For the sake of clarity, it should also be mentioned that the redevelopment of the Earls Court Exhibition Centre and its surrounding also received planning permission in the first quarter of 2012. But because the west London scheme does not involve any form of public subsidy it was in any case ineligible, as we define regeneration projects as being schemes that are at least partially funded by the public sector.
Readers will also notice that some well-known projects are absent, for instance the huge Nine Elms project around Battersea Power Station. We were in contact with the London Borough of Wandsworth about the scheme's inclusion, but those responsible for the project ultimately declined to submit a form, stating: "It is too early in the regeneration process." In early March, plans for 1,870 homes on the site were approved by the council.
Several other projects have also come to our attention and will be contacted directly in future years. While it is not certain that these projects would have been eligible for inclusion in the 2012 listing, they are significant developments and merit closer scrutiny in next year's report. They are: The Knockroon Urban Extension in East Ayrshire; Waterlooville in Hampshire; Tamfourhill, Falkirk; Barry Waterfront; Northumberland Park, Tottenham; and Northstowe, Cambridgeshire.
While we work hard to ensure that the Top 100 is as complete as possible, it is possible that significant schemes escape our attention. If you know of a scheme that should make the list - bearing in mind the eligibility criteria set out on p11, please email firstname.lastname@example.org.
Because of the gap between our research ending and the final publication of this year's report, we felt it only fair to provide an update on projects that feature in the 2012 listing and have seen progress in the past four months.
All of these projects have announced planning or funding progress since January: Greenwich Peninsula; Canning Town and Custom House; Clyde Gateway; Surrey Canal; Grahame Park; Greenwich Millennium Village; South Kilburn; Sevenstone; Bath Western Riverside; Locking Parklands; Chesterfield Waterside; Bracknell Town Centre; Park Prewett Hospital; Union Square Swindon; Skelmersdale Town Centre; Haggerston West and Kingsland; and Littlecombe, Dursley.