Pigeon droppings had been "coming into contact" with staff and visitors at a historic college.
Thandie Newton and Zadie Smith feature among portraits of prominent black Cambridge University graduates.
A campaigner says the move to prevent transgender people from using their preferred toilet is "a step backwards".
Poor accountability was to blame for severe rail disruption last May, a regulator has said.
See what life is like as a medical photographer at a city hospital.
Peterborough return to the top of League One as a wonderful strike from Ivan Toney helps his side beat Gillingham.
George Maris strikes late to earn Cambridge a draw with Mansfield at Abbey Stadium.
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