Edward Veale (left) was in the studio with Phil Spector (centre) and Yoko Ono (right) as they recorded Imagine
In 1969, The Beatles were preparing for their rooftop concert in London when John Lennon asked an engineer if it was possible to build him a home studio.
Edward Veale, from Hertfordshire, was a regular at the Saville Row studios as the band recorded songs such as Get Back and Let it Be.
Often he would be called from his offices down the road to make repairs to The Beatles' basement studio.
Mr Veale would build studios for three Beatles, but Lennon's was the first.
As the Beatles return to the top of the UK singles chart for the first time since 1969 with Now and Then, Mr Veale has been remembering his connections with Liverpool's favourite sons.
"They were still together at that time, but John was clearly thinking about other things," said the engineer who would often fix monitors and other problems for the group as they recorded what would be their final studio album to be released.
Source: By Danny Fullbrook/bbc.com