Ros Atkins On… Four reasons why the relationship between the UK and China is strained

This week, Yang Tengbo was identified as a 50-year-old Chinese businessman and alleged spy for the UK.

This has raised questions about a problem that several UK governments have grappled with – the UK’s relationship with China.

As the UK Chancellor prepares to visit China in the new year, BBC Analysis Editor Ros Atkins looks at how relations between the two countries have deteriorated.