GCSE and A-level students are increasingly unable to tell the time on an analogue clock, teachers have warned.

Digital clocks are being installed in exam halls because teenagers struggle to read the traditional clock face, they said.

One teacher, reported in Tes, told a conference in London: “It is amazing the number of students I am coming across in Year 10, 11 and in sixth form who do not know how to tell the time.

”We live in a world where everything is digital. We are moving towards a digital age and they do not necessarily have analogue watches anymore and they have mobile phones with the time on."

Stephanie Keenan, a teacher at Ruislip High School in London, said her school had replaced analogue clocks for digital ones in the exam hall.

And Nicola Towle said on Twitter that the same had happened at her school because “pupils couldn’t use it to tell the time”.

A number of teachers shared their experiences about the issue on social media.

The curriculum in primary schools requires pupils to learn to tell the time on an analogue clock – but some suggested that the digital age meant some might have forgotten it.

Meanwhile, others suggested that using digital clocks could be helpful to students with dyslexia.

Malcolm Trobe, deputy general secretary of the Association of School and College Leaders (ASCL), said young people were much more used to using digital clocks.