Greece was hit by strikes on Wednesday for the second time in a week ahead of street protests over a controversial labour reform expected to be approved by parliament later in the day.

No ferry services to Greek tourist islands were available and urban transport in the capital was disrupted by the 24-hour walkout. Over 7,000 people according to police demonstrated in Athens against the bill. Additional protests will be held in the evening.

Greek Prime Minister Kyriakos Mitsotakis said the “deeply pro-growth” reform aligns the country with “fast-paced” European standards and brings “transparency” to union processes. One in four workers in Greece today is undeclared or partially declared to labour authorities, the prime minster said.

But communist party leader Dimitris Koutsoumbas said the new system legalises a workplace “jungle” where employees will be “totally defenceless”.

Public services were also shut in opposition to the new law, which promotes working hour flexibility and sets tougher rules on strikes.

The government says the reform introduces optional working hour flexibility, sets rules on remote work, improves parental leave and includes safeguards against workplace sex harassment. A working day of up to 10 hours is permitted under the reform.

The reform introduces optional working hour flexibility, sets rules on remote work, improves parental leave and includes safeguards against workplace sex harassment. A working day of up to 10 hours is permitted under the reform

The law also aims to force unions to assure public services during strikes and make them liable for fines over disruption caused by walkouts. “You want to make strikes symbolic... this is not Japan, where people work as they strike,” the communist party leader said.

Unions and opposition parties say the reform undermines collective bargaining, disrupts employees’ personal lives and formalises overtime exploitation by employers – especially large businesses – which has already been going on for years.

Last week, over 16,000 people took part in separate demonstrations in Athens organised by unions and opposition parties.