According to the survey, 65 per cent of all respondents believe there will be tariff free access for goods, more than half of businesses think the European Court of Justice will still have jurisdiction and 59 per cent think there will still be free movement of people.
Head of FTI Consulting’s Brexit taskforce, John Maloney, said: “We see fluctuations between countries and sectors but on the whole this is a surprisingly upbeat response.”
The report expressed the business leaders wish for politicians to “get on with it” so they can return to a stable business climate.
More than 80 percent of companies in all four UK economies have established Brexit response structures.
The Brexit in the Boardroom report by the consultancy said: “Overall the survey results seem to indicate that businesses are feeling relatively confident that the eventual deal struck will be relatively ‘soft’.”
Spanish firms mostly thought Brexit was negative with the majority saying the UK staying in the EU was preferable.
According to the survey, 66 percent of all businesses surveyed said they expected to increase turnover in the first 12 months following Brexit.
The conclusion of the report said: “Generally speaking, those firms that responded to our survey seem to think that Brexit will not have as big an impact as some have suggested.
“Only small numbers of respondents foresee reductions in turnover, employee numbers and clients in the short term following the UK’s departure in March 2019.”
Hans Hack, a member of the FTI’s Brexit task force, said: “Certainty remains in short supply with little prospect of companies getting comfort on the future trade agreement any time soon.”
The UK’s government cabinet met last week to discuss the future UK-EU trade relationship but did not agree a final position on what the relationship should look like.
Foreign Secretary Boris Johnson will do a speech this week laying out his vision of Brexit as Mrs May tries to unite her party and not bow down to the demands of Brussels.