The Charity Commission site offers access to many useful publications; including press releases and annual reports. The publications tab will allow you to check out the listings of their publications by using the Quick Links List button. These seem to be available in full text (either html or pdf) from 1996 onwards. Examples of those documents published this year include A balancing act: new perspectives on the charity/beneficiary relationship.
The link below will open the external site in a new window: