BBC News Online's special report has all the latest news, an interactive guide to the new cabinet and the chance to have your say.

The changes
While Peter Mandelson's appointment as Northern Ireland Secretary will earn most headlines, the prime minister has made a number of further significant changes:

• Hague: Mandelson job 'arrogant'
• Mandelson begins NI mission
• Mandelson makes his comeback
• Blair's big surprise
• Mixed reaction to Mandelson appointment
• Mandelson to 'complete journey to peace'
• Milburn 'understands the NHS'
• Reid remains at Scotland Office
• Tributes for Mo Mowlam from NI

The personalities
While Mo Mowlam is known as the Labour Party darling and Peter Mandelson is at times referred to as the "prince of darkness", the new health and defence secretaries are virtual unknowns:

• 'Prince of darkness' returns
• Alan Milburn: A healthy challenge
• For the defence: Geoff Hoon
• Cunningham's long goodbye
• Mo Mowlam: The new enforcer
• Employment minister gets new job

The new faces
Still trying to catch up with who's who in Tony Blair's new cabinet? BBC News Online's interactive guide offers you an at-a-glance guide:

Interact: The cabinet reshuffle

The reaction
Was the prime minister right to bring back his close ally Peter Mandelson less than a year after he was forced to leave the cabinet in disgrace. Tell us what you think by taking part in a Talking Point on the subject.

To send us your views on the reshuffle click here