LONDON, April 21 (Reuters) - Shares in Britain's Crest Nicholson fell sharply on Tuesday, after the homebuilder cut its volume guidance due to macro uncertainties caused by the conflict in the Middle East. 

At 0711 GMT, shares in Crest Nicholson were down 34% at 76.6 pence, on track for their sharpest daily fall since the COVID-19 pandemic in March 2020. 

(Reporting by Samuel Indyk; Editing by Amanda Cooper)