(Reuters) – Britain’s competition regulator said on Friday French pastry-mix maker Cérélia will have to sell the Jus-Rol business after the watchdog found that a merger would lessen choice for consumers and harm competition among wholesale retailers of dough in the UK. The Competition and Markets Authority (CMA) said its investigation found that Cérélia and Jus-Rol, both suppliers of ready-to-bake products, make up nearly two-thirds of all such products sold to grocery retailers in the UK. The CMA’s probe found that the two businesses face limited competition from smaller players in the market…