Copyright protects a wide range of creative works – literary, artistic and musical, as well as most recordings and broadcasts, and most software. It protects you from other people copying your work, or using your work without your permission.
In the UK, copyright is an automatic right. This means you don’t need to formally register it. However, this makes it even more important to understand how to protect your own work, and what is permitted when using other people’s work.
Copyright (comprehensive information from the UK Intellectual Property Office)
copyrightuser.org (produced by copyright academics, with the aim of making UK copyright law accessible to the public)