LONDON ART MARKET UNDER THREAT:

LONDON ART MARKET UNDER THREAT:.||**** FOR RUSHES SEE FOOT OF FILE||ENGLAND CBV Worker cleaning 'Christies' sign|London CMS SIDE Another worker cleaning glass exhibit|Christie's case| CBV Woman looking at portrait painting| CMS SIDE Staff member showing painting to| prospective buyer SOT TILT UP and PAN L-R| as hangs it on wall||Sotheby's MS Auctioneer at podium| CMS SIDE People bidding| MS SIDE Staff along with impressionist painting| PAN L-R| CMS Liquid display prices board|| CMS Auctioneer holding up gavel SOT| 'Any more, last chance'|| MS Cezanne painting held up by staff|| LMS Auctioneer accepting four million SOT| 'Sold, thank you so much'|| PAN L-R as staff take painting away|| Earlier in day| MS Cezanne painting hanging precariously on| wall as rope snaps CBV staff member runs to| catch it|| LMS Sotheby's liquid display exchange board| as auctioneer seen on monitor beside|| CBV Staff member removes modern painting| as another brings next painting in| GV Auction room||London SW1 CMS Colin Gleadell (Art Market journalist)| intvw SOT| - They'll be happy with performance/ have| turned over about 70million pounds over| last four days of impressionist and modern| art/ they've done as well as last year,| best since boom of 1990||Christie's CS Detail of modern painting| CS Ditto|| CMS Sam Ofa...