Teachers in England can use artificial intelligence (AI) to speed up marking and write letters home to parents, new government guidance says.

Training materials being distributed to schools, first seen exclusively by the BBC, say teachers can use the technology to "help automate routine tasks" and focus instead on "quality face-to-face time".

Teachers should be transparent about their use of AI and always check its results, the Department for Education (DfE) said.

The Association of School and College Leaders (ASCL) said it could "free up time for face-to-face teaching" but there were still "big issues" to be resolved.

BCS, the Chartered Institute for IT, said it was an "important step forward" but teachers would "want clarity on exactly how they should be telling... parents where they've used AI".