JD Wetherspoon saw its shares tumble by 10 per cent after posting lower-than-expected first-half profits, despite solid sales growth across its pub estate. The pub group blamed higher labour and utility costs for the dip in performance, sparking investor concern and a sharp sell-off. Shares in the company dropped 62p to 535p as operating profits fell to £64.8 million in the six months to January 26, down from £67.7 million a year earlier. Analysts had...