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Getting teachers to grade GCSE and A-level pupils in England will be "fair" and "durable", the PM says.
The move to the second-highest level means the NHS is no longer at imminent risk of being overwhelmed.
Around one in 10 rail services should be cut while passenger numbers remain low, says Network Rail.
The supermarket says it has begun consulting with workers over a major restructuring of its business.
The protester, who left with two others, spent 30 days in the tunnel under Euston Square Gardens.