UK manufacturing confidence has reached a 20-month high in defiance of the Brexit and Trump effect, according to the latest Business Trends Report by accountants and business advisers BDO LLP.

BDO’s Optimism Index, which indicates how firms expect their order books to develop in the coming six months, now sits at 103.7 from 102.2 in December, above its long term trend. Manufacturing’s sub-index has risen to 102.2 from 99.4, passing the 100 mark, which indicates growth, for the first time since June 2015. The Services Optimism sub-index has also increased from 102.7 to 103.9 this month, a 14-month high.

BDO’s Output Index - which indicates how businesses expect their order books to develop in the next three months - has increased for the third consecutive month, rising slightly from 97.4 to 97.5.

BDO attributes the positive performance of UK businesses to an overall improvement in the global economy, the decrease in the value of sterling and better-performing key export markets.

However, despite the immediate benefit of sterling’s sharp fall in value and the optimistic mood of UK businesses, sterling’s devaluation represents a double-edged sword as it continues to contribute to rising inflation.

BDO’s Inflation Index has increased to 104.5 from 103.8 and the upward trend is set to continue. While currency depreciation makes British exports more price competitive, firms’ input prices have risen sharply, squeezing margins. In January, Markit/CIPS PMI showed factory raw material costs rose at their fastest pace in over 25 years, a result of higher prices for oil, steel and other import costs.

For the manufacturing sector to continue to thrive following Brexit, BDO says UK manufacturers need to invest now to automate and digitise key business processes to remain competitive in a more dynamic and technologically advanced market.

Martin Gill, head of BDO LLP in Scotland, said: “The economy seems to be remarkably resilient both in Scotland and the UK as a whole. Businesses are surprisingly confident about the short term, encouraged by the opportunities our cheaper currency and a better-performing global economy have created. These have provided a much-needed short-term boost for our economy, particularly our manufacturers.

“However, government still has much to do in these uncertain times if the UK is going to stay on the right economic track.

“The modern industrial strategy could be a step in the right direction. More importantly, simplifying regulation and taxes, and improving our education and training systems are high priorities for businesses in the new economy. And with government borrowing costs still close to all time lows, the opportunity to replace our worn out infrastructure is still an enticing one.”