Teachers and lecturers are the professionals most likely to clock up unpaid overtime, according to figures released by a trade union.

The report, published by the Trades Union Congress (TUC), revealed more than half of teaching professionals work unpaid each week and put in an extra 9.6 hours on average. The figures mark the TUC's "work your proper hours day" which attempts to highlight the amount of overtime UK employees carry out.

UCU general secretary Sally Hunt said: “Friday’s figures confirm that our teachers and lecturers continue to go above and beyond the call of duty for their pupils and students. The government cannot keep expecting more for less from such dedicated people, particularly when their reward is real-terms pay cuts and attacks on their pensions.”

The revelation follows a bid by Michael Gove to extend teaching hours, which was greeted with anger by many teachers, with one asking "has he ever met a teacher?".

But it isn't just teachers who are working for nothing.

Top occupations for unpaid overtime:

Occupation	Number working unpaid overtime	Proportion working unpaid overtime (%)	Average weekly hours of unpaid overtime
Teaching and educational professionals	723,997	55.6	9.6
Financial institution managers and directors	49,632	52.7	10.2
Health and social services managers and directors	51,860	50.5	6.9
Media professionals	49,250	50	6.9
Functional managers and directors	293,053	47.2	8.5