Half of UK-domiciled growth businesses would back a second referendum on the UK's membership of the European Union, research conducted by investment firm BGF suggests.
A poll of nearly 200 CEOs or chairs of small- to mid-sized businesses with plans to expand in 2019 found just 46.8% of respondents support the deal put forward by Prime Minister Theresa May.
May's deal is being put before Parliament on 11 December, with the proposition facing opposition from all sides of the House of Commons.
However, according to BGF, an overwhelming majority 75% of UK growth businesses back May's deal when compared to a no-deal Brexit.
Despite limited support for the deal itself, just 14% said they would back a no-deal Brexit when compared to May's offering, while 11% are unsure.
CEO of BGF Stephen Welton said respondents "overwhelmingly" believe May's deal is "not a good outcome".
He added: "[However] it is better to have momentum around the deal that is on the table, rather than returning to the drawing board - unless a credible 'Plan B' is truly deliverable before the end of next March."
Welton also warned "there is a real risk of a silent but significant slowdown as confidence in the UK ebbs, and companies put their investment plans on hold".
He said: "Moving quickly to a more predictable landscape at the same time as safeguarding a healthy level of funding should be the two immediate priorities in regards to business."
Elsewhere, the research also found very little appetite for a General Election, with 84.7% of respondents not in favour of such an outcome.
Welton added that despite mounting uncertainty regarding Brexit, BGF was "exploring ways" to increase its investment in UK businesses post-Brexit.
He said: "Undoubtedly a nervousness exists, and we need to ensure that motivated companies are not forced to down tools on their ambitions because of a lack of investment."
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