The conciliation service helped settle nine out of 10 disputes in the past year as demand for its assistance remains “strong.”
Acas said it was called in to help resolve 744 national and regional collective disputes in the year to March, as well as receiving almost 900,000 calls to its helpline on issues including dismissal, contracts and redundancies.
Its individual dispute resolution service had 92,000 cases, with 17,500 progressing to a tribunal claim, mainly for unfair dismissal.
Sir Brendan Barber, who chairs Acas, said: “Demand for Acas’ services continues to be strong. The past year has seen us deal with a large number of collective disputes such as London Underground, UK airports baggage handlers and British Airways cabin crew.
“Our annual report shows how our diverse range of services are continually adapting to meet the new and changing demands of the modern day workplace.
“This is especially important now as good workplace practice can help navigate the change that some organisations may have to go through due to Brexit.
“Good workplace relations and practice can also help to improve productivity in the workplace, reaping huge benefits to businesses, employers, employees and the economy. Latest independent research confirms that for every £1 Acas spends, there is a £13 benefit to the economy.”