On a summer evening in 2015, Joshua Jones, 23, put on a suit, telling a friend he needed to pop to the office.

He had just been paid that morning but he had already gambled away the monthly salary and bonus he received as a trainee accountant. Later that day Jones went to the PricewaterhouseCoopers London office block on the south bank of the Thames and took the lift to the top floor of the building. That is where he took his life.

“If you talked to any of his mates, they would describe Josh as the life and soul of the party,” said his father, Martin Jones, 73.

Joshua Jones grew up in Wiltshire with his father and mother, Kim, now both retired civil