Nest, the UK's national pension scheme, is considering a maiden investment in high-yield bonds following a profitable exit from surging UK government bonds – as the scheme's assets top £1 billion for the first time.

Nest, which stands for the National Employment Savings Trust, was set up in 2011 to act as a default workplace pension for companies that don't want to set up their own schemes. It has since grown to three million members and £1 billion in assets and is set to grow further.