However, the accountancy firm has warned that a protracted outbreak could result in a more severe impact than the downturn experienced in 2008-09.

The economy is expected to recover by the second half of 2021 at the latest under both scenarios.

KPMG’s main scenario assumes the public health measures put in place around the world stem the rise in the number of cases by the summer.

In this case, it is expected that the economy remains flat in the second half of the year with a strong recovery in the first half of 2021, as uncertainties around the pandemic dispel. This would see UK GDP fall by 2.6% this year, then grow by 1.7% in 2021.

However, if the pandemic persists until the second half of next year, GDP could contract by 5.4% this year and by another 1.4% in 2021.

With so much uncertainty about how COVID-19 will develop in the weeks and months ahead, KPMG’s latest forecasts are based on a range of scenarios. However, even in its main one, the effects of the pandemic on global economic growth, consumer spending and business investment in particular, will still be highly significant.

Catherine Burnet, senior partner at KPMG UK in Scotland, said: “The latest Economic Outlook data highlights the scale of the challenge facing businesses across Scotland. Fiscal measures and immediate relief action from the Scottish and UK Governments have gone some way to help mitigate some of the damage, but there’s widespread acknowledgement that more action will be needed in the coming months to keep the economy moving. The business community also needs to work together more collaboratively than ever before to ensure we’re playing our role in supporting employees, customers and wider society.”

Yael Selfin, chief economist at KPMG UK, added: “The COVID-19 pandemic is first and foremost a human crisis but there will also be a very substantial negative impact on the global economy and the UK’s economic performance this year and potentially next, but the economy is expected to recover by the second half of 2021.

“Until we know how and when the COVID-19 outbreak will end, the scale of the negative economic impact will be difficult to quantify. However, it is now almost certain that the UK is slipping into its first significant downturn in over a decade.”

Despite the Bank of England’s move to reduce interest rates and further measures announced by both the BoE and the Chancellor to support businesses and individuals during the COVID-19 outbreak, much more will be needed to protect the economy from the worst of the hardship during this pandemic and prevent a deeper economic slump.

Assuming more measures are enacted to support businesses, the disruption to economic activity in the first half of the year could see unemployment peak at around 5.6% in May. KPMG predicts this will then ease gradually to around 4.1% by Q1 next year, leaving the labour market relatively tight again.

Protecting jobs and incomes in the short term will provide needed support to besieged households, but the extent of help they will receive remains uncertain.

Businesses selling consumer goods and services face a dramatic fall-off in demand following the introduction of restrictions on social gatherings and quarantine measures. Importers and exporters will need to cope with the multiple challenges of supply chain disruption, workforce loss and workplace shutdown, all at the same time when the UK’s key trading partners are also heading into recession.

However, low inflation will leave the Bank of England some room for monetary expansion to combat both turbulence in markets and the economic downturn, but with interest rates at record low, more creative stimulus measures will need to be used.

Mr Selfin concluded: “With the UK’s government charged with meeting an ambitious timetable for its post-Brexit trading relationship with the EU, the scope for further economic uncertainty this year was already high. However, the COVID-19 pandemic represents a far more dramatic short-term disruption to growth.

“While both governments and central banks have moved quickly to offer fiscal and monetary policy support to the global economy, more will be needed to shore up the economy in the short term, including measures to help the most vulnerable businesses and households and prevent a deeper economic slump.

“The impact of the pandemic will be far reaching. It is likely COVID-19 will result in a massive expansion in government debt and this could threaten to dislodge the Government’s original vision to “level-up” the UK economy, long after the pandemic is past – leaving the Chancellor with a big challenge on his hands.”

Read all of our articles relating to COVID-19 here.