The Southbank Centre has unveiled plans to transform the complex around the Queen Elizabeth Hall, the Purcell Room and the Hayward Gallery.
The proposals include the refurbishment of the existing 1960s buildings and the creation of a new glass pavilion and a central foyer.
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Anyone with information can contact the Celia Hammond Trust in confidence via email on firstname.lastname@example.org or call 020 7474 8811.
A Hamsptead mum who is in jail in Iran has ended a hunger strike after three days.
Their pleas came as charity worker Nazanin Zaghari-Ratcliffe was expected on Wednesday to be in her third day of a hunger strike.