The Twentieth Century Societys Coming of Age campaign is calling for the listing of 10 buildings that opened in 1994.The architectural campaign group, which works to save outstanding buildings completed after 1914, is demanding a more proactive listing process for iconic buildings as they turn 30.The poster child for its campaign is Nicholas Grimshaws International Terminal at Waterloo, which it describes as an iconic transport interchange and a masterpiece of engineering which has a confidence and swagger few buildings embody in the 21st century.AdvertisementThe High-Tech building, which features a telescopic glass and steel superstructure, served as Londons Eurostar terminal from 1994 till 2007 when operations moved to St Pancras. It has won awards including the RIBA Presidents Building of the Year and the Mies van der Rohe Award for European Architecture. Source:Peter CookWaterloo International Terminal, London by GrimshawAnother Grimshaw building, the RAC regional control centre in Bristol, is also on the list.Others included in the eclectic mix include: Populouss Kirklees Stadium in Huddersfield winner of the 1995 RIBA Building of the Year award; Hopkins Architects Glyndebourne Opera House in West Sussex; Cullinan Studios Library at St John's College in Cambridge; Phillip Englands Pepsi Max rollercoaster station in Blackpool; and Niall Phillips Welsh Wildlife Centre in Pembrokeshire.Also featured on the list are two houses: Future Systems Hauer-King House in Islington, which featured in the BBCs Building Sights series; and Hudson Architects Baggy House in Devon. There is also a spot for Garthdee student housing in Aberdeen by Jeremy Dixon and Edward Jones. Source:Twentieth Century SocietyBaggy House, Devon by Hudson ArchitectsThe selection criteria for listing buildings are set by the Department for Culture, Media and Sport, while Historic England provides detailed guidance and carries out research for each specific case.AdvertisementPrimary considerations for listing a building include its special architectural and historic interest, although the principles state that buildings under 30 years old are not generally considered eligible as they have yet to stand the test of time.The Twentieth Century Society is arguing that there is no current mechanism to proactively review buildings when they reach this 30-year threshold, leaving them unrecognised until they come under threat of demolition or harmful alteration.The societys director, Catherine Croft, said: Why wait until the bulldozers are poised, to intervene and try to protect outstanding buildings such as these, when it is possible to make an objective judgement far earlier?She described the 10 selected buildings as vivid manifestations of Britains aspirations and priorities at a time, in the early 1990s, which is now at the centre of our cultural nostalgia, but probably more distant than we might think from our world today.She added: The sheer glamour of Waterloo International Terminal speaks to a confidence and swagger few buildings embody in the 21st century and is one of the best examples of High-Tech architecture in the country, open and accessible for all to see. Source:Martin CharlesGlyndebourne Opera House by Hopkins Architects