Businesses have been sounding the alarm over Britain’s impending departure from the European Union ever since its approval in a 2016 referendum. But this week, with lawmakers unable to agree on any sort of orderly plan as the March deadline for a deal nears, their warnings rang louder — and some decided to act.

Airbus and Bentley called the prospect of Brexit without an agreement a “killer” and a “disgrace.” Sony, concerned about Brexit-generated disruptions, said it would move its European headquarters from Surrey to the Netherlands. Other companies are furiously stockpiling supplies, while civil servants are scrambling to prepare for emergency arrangements.

While politicians may yet pull together a deal before March 29, analysts say businesses have run out of time. The precarious state of affairs is already damaging the economy.

“Until the middle of last year, it was a slow burn — we lost about 2 to 3 percent of output,” said Amit Kara, head of British macroeconomic research at the National Institute of Economic and Social Research. “My feeling is it has gathered a little bit of pace since then.”