What changes have been made to Coinbase in the UK?

In recent times, Coinbase has undergone significant changes in its operations in the United Kingdom. Could you elaborate on the key modifications? Have there been any regulatory updates that Coinbase has adapted to in order to ensure compliance? Additionally, has the platform introduced any new features or services specifically targeted at UK customers? Moreover, how has Coinbase addressed any security concerns raised by the British authorities or its customers? Finally, how have these changes impacted Coinbase's overall performance and market share in the UK cryptocurrency market?