Q&A: Communications Data Bill

The rules would require UK companies to keep a wider range of data about users

The government's draft Communications Data Bill details plans to increase the amount of data gathered about the web and mobile habits of anyone in the UK.

But why is the bill needed and what will be retained?

What are the proposals?

How is that different to now?

What is the argument for change?

The way the net handles data makes it inevitable that police will invade privacy, say critics

What is the opposing view?

What is possible in technical terms?

Are there limits to what is possible technologically?