Rumours are circulating that Gerald Ronson is preparing to sell his stake in Crest Nicholson. Ronson, who built up his 23.3% stake in Crest three years ago when shares were trading at around 300p, would make a £65 million profit on yesterday’s closing price of 544.25p. Traders expect Wimpey, Persimmon and Bovis to be at the front of the queue …