Princess Mary of Denmark and Germany's Princess Mafalda of Hesse also feature.

BBC: Samantha Cameron in Vanity Fair best-dressed list

The painting, dated to around 1637, shows Princess Mary at the age of five or six, wearing a rich silver-laced gown and pearl head-dress, standing before a classical column and ornate gold damask curtain.

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The context (also explained elsewhere in the state papers) is that Charles wished the Princess Mary, Henry's daughter by his first wife Catherine of Aragon, to be restored to the order of succession, a request Charles believed to be reasonable given that Henry was still young enough to father a legitimate son.

ECONOMIST: Tudor history

Queen Elizabeth in Woolwich, The Princess Royal in Orpington and Queen Mary's in Sidcup.

BBC: South London Healthcare Trust should be split up - report

The trust was created by merging three hospitals - the Princess Royal in Orpington, Queen Mary's in Sidcup and the Queen Elizabeth in Woolwich - and is the first NHS trust to be put into administration.

BBC: Private firms may bid for South London Healthcare Trust

The Princess Royal is likely to be taken over by King's Health Partners in south London, Queen Mary's would be taken over by a mix of Dartford and Gravesham and Oxleas NHS trusts and the Queen Elizabeth is expected to join up with Lewisham Hospital.

BBC: South London Healthcare Trust should be split up - report