![Pedestrians walk past the entrance to the National Portrait Gallery in central London. AFP](https://thenational-the-national-prod.cdn.arcpublishing.com/resizer/v2/PAZN4T6OVECO4PRHWYXQP6UXAQ.jpg?smart=true&auth=83b6141f4ca3bbed1d7bd6b20a2b2bd5a0296c3da031ebbe1ecebd84d04ae712&width=400&height=225)
Pedestrians walk past the entrance to the National Portrait Gallery in central London. AFP
Pedestrians walk past the entrance to the National Portrait Gallery in central London. AFPLondon's National Portrait Gallery to close for three years
It is part of a multi-million pound redevelopment project to transform the gallery