Ceramic poppies from Tower of London memorial may crack in the cold Each poppy was sold for £25 to members of the public Tower officials have warned buyers not to put them outside in cold weather Sections of the poignant war tribute will remain until the end of November Thousands have been sold to raise money for armed forces charities The Wave and The Weeping Window will remain until the end of the month By Sam Webb and Jennifer Smith for MailOnline The ceramic poppies at the Tower of London could crack in cold weather, buyers have been warned. To date 888,246 poppies have been planted in the Tower's moat to commemorate the 100th anniversary of the First World War - each one representing a fallen British or Commonwealth soldier. Each poppy was sold for £25 to members of the public by mid-October. Historic Royal Palaces, who have overseen the incredibly popular memorial, said the poppies have to be removed so they can be sent top buyers by January as promised, despite calls for the installation to remain there longer. Ceramic poppies at the Tower of London, which have been sold to members of the public for £25. Buyers are being warned not to put them outside until spring because they may crack in extremely cold weather The installation of over 888,000 red ceramic poppies was created by artist Paul Cummins, each poppy representing a British or colonial fatality during World War One Now it has emerged that buyers are being warned not to put them outside until spring because they may crack in extremely cold weather, reports the Sunday Times. Despite a public campaign to make the entire display permanent, a team of 8,000 volunteers will begin dismantling and cleaning the flowers on November 12. The Prime Minister and his wife walking among the ceramic poppies at the Tower of London yesterday Politicians pleaded with organisers to keep Blood Swept Lands and Seas of Red at the Tower of London permanently following the site's popularity. An estimated 4million people will have viewed the attraction by November 12, prompting an online campaign with more than 20,000 signatures to stop it being dismantled. London Mayor Boris Johnson is also reportedly in favour of keeping the artwork at the Tower. The politician told the Evening Standard this week: 'I'm keen to explore whether we can keep the exhibition open for longer, to give as many people as possible the chance to glimpse something so incredible, whilst easing the pressure on numbers.' Lib Dem leader Nick Clegg, who has not yet visited the attraction, told radio listeners: 'It's really struck a chord, it's extraordinary and very moving to see. 'Let's maybe keep the display going a bit longer, but not deprive those charities of that much needed money from the sale of the poppies.' Also planting poppies were Chelsea Pensioner Albert Willis, 79, an ex Grenadier Guard alongside a Tower of London Yeoman Warder and a serving Grenadier Guard