A removal firm has completed the relocation of more than four million books back to the newly-refurbished Liverpool Central Library and Archive.

The Grade II listed building on William Brown Street reopened this month, after a £50million upgrade.

Andrew Porter Limited, based in Adlington, Chorley, was responsible for relocating its entire collection from various storage locations across the North West including a 150m-deep salt mine in Cheshire.

The collection comprised some of the world’s rarest and most valuable books, including Audubon’s Birds of America, which is housed in a dedicated display case in the newly refurbished library, and is worth an estimated £8.5million.

“This was an extremely large and complex project that has been completed successfully and on schedule,” said managing director of Andrew Porter Limited, Tim Aspey.

“This was a fantastic job to work on at such a major institution.”

Around 20 crew members per day helped to pack and relocate the library stock.

They used methods, including the use of export wrap, acid free tissue and bespoke transport boxes and cages.

Mayor of Liverpool, Joe Anderson, said: “Central Library is without doubt one of the most significant and celebrated buildings in Liverpool and its restoration is more than just bringing a venue back into use, it’s investing in the heritage of the city.

“Andrew Porter Limited’s role was hugely important and they played a vital part in ensuring the city is now home to one of the most hi-tech and beautiful libraries in the UK.”