Britain's competition watchdog is proposing to prevent Aldi and Lidl blocking rival supermarkets from opening close to their shops. Aldi and Lidl are not covered by the rules because they were not considered to be 'large grocery retailers' when the 2010 Controlled Land Order was drawn up. This month, Richard Walker, Iceland's executive chairman, urged the CMA to get on with deciding whether or not to rein in Aldi and Lidl. A Lidl spokesperson said: 'We note the CMA’s provisional decision regarding our status under the Controlled Land Order. 'To ensure this happens, we put rules in place to prevent big supermarket chains blocking rival stores from opening nearby – and now we propose applying those rules to Aldi and Lidl too.