Update: The Xbox Store issues appear to have been resolved as of this afternoon, UK time.
A few minutes ago we picked up signs of an Xbox Live service issue in the UK and US, with players unable to browse the Store from the dashboard. While it may not impact all users in the area it's worth bearing in mind that the Store may be unavailable.
Issue Details Description:
Browsing the Xbox Games StoreStarted: 21st October 2019 at 08:54
Affected regions: GB, US
Affected services: Purchase and Content Usage
Impacted devices: Xbox 360, Xbox One, Xbox.com, Windows Phone, Windows 10
If you are experiencing any issues and have updates or a workaround, please share your thoughts in the comments. You can keep up with the latest Xbox Live service status here.