Dear
I lived in London and this is capital city of the UK and there is nothing high speed broadband in my area as I am work from home and using film for my work! I upload 1GB to SharePoint and it take me on hour I felt not right! As the government say that all property should be full FTTP cable to the property but where is my area please????
You would need to ask Openreach. This is just a BT Retail customer forum.
https://www.openreach.com/help-and-support/questions-about-fibre-availability
https://www.openreach.com/fibre-broadband/ultrafast-full-fibre-broadband