The UK week in pictures: Nazanin released, the Cheltenham Festival and St Patrick's Day

'The National' selects the most striking photos from across Britain over the past week

On Monday army engineers took part in the Royal Electrical and Mechanical Engineers' Iron Challenge in Liss, Hampshire. PA

A cherry picker was used on Monday to reach a property in Belgrave Square, central London, where squatters were occupying a mansion belonging to Russian oligarch Oleg Deripaska. PA

Jockey Bryan Cooper makes his through dense crowds on his horse 'Bring On The Night' after a race on day one of the Cheltenham Festival on Tuesday. PA

A newly born spring lamb was pictured on Tuesday at Nethermorton Farm in Warwickshire. PA

Britain's Boris Johnson listens in London as Ukrainian President Volodymyr Zelenskyy addresses leaders attending a meeting of the Joint Expeditionary Force on Tuesday, a coalition of 10 states focused on security in northern Europe. AP Photo

A police officer speaks with migrants picked up at sea attempting to cross the English Channel on Tuesday, as they wait to be taken for processing in Dungeness. AFP

A man explores the main gallery during a preview for Van Gogh Alive on Wednesday, an immersive, multi-sensory art experience combining high-definition projections of paintings with digital surround sound in Edinburgh. PA

On Wednesday evening Roberto Firmino of Liverpool got up and close personal with fans as he celebrated scoring his side's second goal during the Premier League match between Arsenal and Liverpool. Getty Images

Nazanin Zaghari-Ratcliffe hugs her husband Richard Ratcliffe and their daughter Gabriella upon her arrival at the UK's RAF Brize Norton airbase on Thursday. AFP

Boris Johnson working aboard an aircraft as he returned to the UK on Thursday following his trip to Saudi Arabia and the UAE. AFP

'Elvis', a cavajack dog, relaxes in daffodils during sunny weather in Wapping, east London, as spring weather arrived on Thursday. EPA

Kate, Duchess of Cambridge and Prince William laugh as Lieutenant Colonel Rob Money puts a bearskin hat on his 20-month-old daughter Gaia Money's head as they attend the 1st Battalion Irish Guards' St. Patrick's Day Parade at Mons Barracks on Thursday. AP Photo

A male beaver swims after being released in a specially designed enclosure in Enfield on Thursday, as beavers were re-introduced to London for the first time in more than 400 years. Reuters

A dog walker on Bamburgh Beach in Northumberland during sunrise on Friday morning. PA

This week, Nazanin Zaghari-Ratcliffe and Anoosheh Ashoori arrived back in the UK after being held in Iran for more than five years each, the Cheltenham Festival drew tens of thousands of fans to the Gloucestershire racecourse, sparking fears it could become a “super-spreader event” amid rising Covid-19 case numbers, and the Duke and the Duchess of Cambridge and the 1st Battalion Irish Guards were at the St Patrick's Day Parade at Mons Barracks.