The Swiss pharmaceuticals company Novartis has said it is stockpiling drugs in the UK before a possible no-deal Brexit, which it warned would be “hugely impactful” for patients. Firms across the economy are bracing for the possibility of the UK leaving the EU on 29 March without a deal after parliament resoundingly rejected Theresa May’s withdrawal agreement. The Basel-based company said on Friday it imported 120m packs of medicines to the UK from the continent each year but suggested a…