Image copyright PA Image caption Mr Blunkett, right, did not mind Prince Charles commenting on schools policy

The Prince of Wales tried to persuade Tony Blair's government to expand grammar schools, former education secretary David Blunkett has said.

In a BBC Radio 4 documentary examining the constitutional role of the prince, Mr Blunkett said Prince Charles "didn't like" it when his request was refused.

He discussed complementary medicine and climate with other Labour ministers.

A spokeswoman for Prince Charles said he seeks to help people and communities here and abroad in whatever way he can.

Asked about remarks by Mr Blunkett and two other former cabinet ministers in the documentary, The Royal Activist, the spokeswoman said he "would not comment on private conversations".

Former prime minister Sir John Major also told the documentary that he changed policies after discussing them with the Queen.

If you are waiting to be the king of the United Kingdom... you genuinely have to engage with something or you'd go spare David Blunkett

'Unacceptable'

Recalling his conversations with Prince Charles, Mr Blunkett, who was education secretary between 1997 and 2001, said: "I would explain that our policy was not to expand grammar schools, and he didn't like that.

"He was very keen that we should go back to a different era where youngsters had what he would have seen as the opportunity to escape from their background, whereas I wanted to change their background."

"I can see constitutionally that there's an argument that the heir to the throne should not get involved in controversy; the honest truth is I didn't mind," added Mr Blunkett.

Media playback is unsupported on your device Media caption David Blunkett: "I would explain that our policy was not to expand grammar schools and he didn't like that"

"If you are waiting to be the king of the United Kingdom, and you've waited a very long time, you genuinely have to engage with something or you'd go spare."

But Graham Smith, chief executive of the group Republic which campaigns for the abolition of the monarchy, said it was wrong for any member of the Royal Family to try to shape the decisions of the elected.

He said royals should "stay out of politics completely" and that the claims were "completely unacceptable in a democratic society".

Image copyright PA Image caption The prince, pictured with then Welsh Minister Peter Hain, centre, has often made his views known

Former environment minister Michael Meacher recalled that he and the prince "would consort together quietly" to affect policy on climate change and genetically modified crops.

He said they worked together "to try and ensure that we increased our influence within government" and to "persuade Tony Blair to change course".

Asked if there might be a constitutional problem in the prince taking a political opinion, Mr Meacher replied: "Well, over GM I suppose you could well say that. Maybe he was pushing it a bit. I was delighted, of course."

A 'meddling' prince?

It is not the first time Prince Charles has attracted interest - and at times criticism - for his views.

Previously:

Prince Charles has been a well-known supporter of complementary medicine. According to another former Labour cabinet minister, Peter Hain, it was a topic they shared an interest in.

"He had been constantly frustrated at his inability to persuade any health ministers anywhere that that was a good idea, and so he, as he once described it to me, found me unique from this point of view, in being somebody that actually agreed with him on this, and might want to deliver it."

Image copyright PA Image caption Sir John Major said it would have been "very foolish" not to be influenced by the Queen

I can recall occasions where the Queen in discussion put a gloss upon something that made one think and reflect upon whether it was being done in the right fashion Sir John Major

Mr Hain said during his time as Secretary of State for Northern Ireland in 2005-7 he was able to introduce a trial for complementary medicine on the NHS.

He said Prince Charles had been "really enthusiastic" and tried, unsuccessfully, to persuade the governments in England and Wales to do the same thing.

The prince's policy interventions have also been supported by Sir John Major, who revealed that he occasionally changed policy as a result of discussions with the Queen - although he would not be drawn on the specific times this took place.

Asked if he remembered being influenced by the Queen, Sir John said: "I think every prime minister can think that, and can think of occasions where that happened."

He said it would be "very foolish indeed" not to be influenced.

"I can recall occasions where the Queen in discussion put a gloss upon something that made one think and reflect upon whether it was being done in the right fashion at the right time," Sir John said.

The Royal Activist is available to listen to on BBC iPlayer Radio.