Ashdownspoke ashe accompanied the party's Richmond Park and North Kingston by-election candidate Sarah Olney to a curry restaurant in the constituency.
The pair spoke with the owner and head chef of theRoz Ana restaurant in Kingston about its problems recruiting chefs from abroad and the impact of Brexit on rising food prices.
"May's dogmatic approach on immigration is damaging Britain's economy and letting down businesses, including by undermining trade talks during her shambolic trip to India this week," Ashdown said.
"Leading Brexiteers like Priti Patel said a vote to 'Leave' would saveBritish curry houses struggling with a shortage of skilled chefs; now as senior ministers at the heart of this government these 'Brexiteers'are failing the very businesses they promised to help.
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"The Liberal Democrats will hold this Conservative Brexit government to account for the cynical attempts made to mislead voters during the referendum campaign."
May, during her three-day visit to India from November 6, had said her government will consider further improvements to its visa offer to India if the South Asian country steps up efforts to take back Indians "with no right to remain" in UK.
Curry house owners are worried about the post-referendum clampdown on immigration, as they are already struggling to hire chefs from abroad and are facing mass closures.
According to a recent survey cited by The Independent, the number of licensed curry restaurants has declined by 13 per cent in the last 18 months, with over 1,000 restaurants closing their doors for good.
"Small local businesses are struggling at the hands of this Conservative government'sreckless and divisive approach to Brexit," Olney said.