LONDON (AP) — The British government must quickly come up with a plan for post-Brexit trade relations with the European Union or risk a hit to investment and jobs, a leading business group said Wednesday. In a letter to Prime Minister Theresa May, the British Chambers of Commerce said businesses' "patience is wearing thin" with government divisions. It said a lack of clarity meant businesses were starting to activate Brexit contingency plans, which could mean moving jobs from Britain to the EU. Chambers of Commerce director-general Adam Marshall and president Francis Martin told May "there is no room for continued ambiguity as companies make investment and hiring decisions." "The government must set out its plans," they said.