Two out of five young parents on low wages are “penalised” when they ask for flexible work arrangements with some even losing their job, a report published today reveals.

The TUC found that more than half of those working in retail, hospitality and social care did not know their employment rights, with many unaware of their entitlement to unpaid parental leave.

Many said they were given fewer hours, worse shifts or even lost their job as a result of asking their employer for flexible arrangements, the poll showed.

As a result, a number had to take sick leave or holiday to cover childcare, while some said they were prevented from leaving work in an emergency.

TUC general secretary Frances O'Grady said: “Too many workplaces expect mums and dads to forget all about their kids as soon as they walk through the door, but it’s a nightmare to plan childcare when your boss changes your shifts at the drop of a hat, and you never work the same weekly hours twice.”

The TUC is calling for all workers to be given their rights in writing and to be notified of shifts a month in advance.