LONDON: British aero-engine maker Rolls-Royce said it was continuing with contingency plans as uncertainty grows over whether Prime Minister Theresa May’s Brexit plan will receive parliamentary backing. “This agreement is only a draft,” CEO Warren East told BBC radio on Friday, joining a line of industry captains urging politicians to be pragmatic and not torpedo an agreement that would allow UK-EU trade to keep flowing. “We are going to continue with our contingency plans and that includes buffer stocks so that we have all the logistical capacity that we need to carry on running our business.” Manufacturers such as Rolls-Royce fear new customs duties and red tape could threaten the just-in-time delivery of thousands of parts on which they depend if Britain crashes out of the EU on March 29. May’s office has released statements from a number of major companies such as Diageo, the London Stock Exchange and Royal Mail in support of her deal. The British pound clawed back losses as May clung to her Brexit plan, and Britain’s FTSE 100 and FTSE 250 both recovered, rising 0.2 and 0.3 percent respectively after Thursday’s sharp sell-off. But she is still grappling with the biggest crisis of her premiership following the resignation of key ministers in protest over the draft deal, and faces a tough battle to get it through Parliament if she survives. “The political situation remains uncertain,” German carmaker BMW said late on Thursday, adding that it would continue to prepare for the worst-case scenario, which is what a no-deal Brexit would represent. BMW’s Mini plant in Oxford accounts for 13 percent of Britain’s total car production, with nearly 220,000 cars built there last year.