内容摘要：A former physics teacher whose sexually explicit OnlyFans profile was seen by school pupils has been struck off.

A former physics teacher whose sexually explicit OnlyFans profile was seen by school pupils has been struck off.

Primary pupil numbers are decreasing, though,, and staffing issues have been felt most acutely in secondary schools - particularly in specialist subjects like maths, science and languages.

Computer science teacher Sam Alner says he loves the "dynamism" of teaching, but regularly wonders how long he can sustain it."Relentless is probably a word people would use when they talk about teaching," he says.Now 12 years into his teaching career, Sam is also vice principal at Bridge Academy in Hackney, east London, where more than half of the students receive free school meals.

During the busy exam season, his day can begin at 05:00 and regularly finish late for parents' evenings, which he says can be "really, really full on".Sam has no plans to go anywhere anytime soon, saying he loves the "hustle" of school life. But he says he has seen other experienced staff members leaving to find a better work-life balance, or higher-salaried jobs, in recent years.

"There's always more you can do because you can always spend that little bit extra time on making a lesson better," Sam says.

"When you're young and fresh that's OK. But when you're having to make the choice between that work-life balance, I think that's when people look at teaching and go: 'I can't sustain or justify this.'"The Welsh government has been asked to comment.

The organisation says figures show "nearly 4,000 PE hours lost in the last year alone" in state-funded schools, and calls for "urgent action to protect and prioritise" the subject.The YST also claims that since the London 2012 Olympics "almost 45,000 PE hours have disappeared from secondary school timetables", and that the number of PE teachers in England has also dropped by 7%.

In response, the government said it is "determined to break down barriers to accessing PE and school sports for young people".In its annual report, the YST says that 2.2 million children in England are now doing less than 30 minutes of activity a day, and less than half (48%) are meeting the UK's Chief Medical Officers' recommendation of at least 60 minutes of physical activity a day.