The role (if any) played by former diplomats in public life depends to quite a degree on how – and how far – they draw on their extensive and unique experiences in the Diplomatic Service.

So, questions.

What are the limits if any on what they can say publicly about information/insights and sheer gossip gained from working for the taxpayer?

And who decides?

Following the noise generated by the memoirs of Sir Christopher Meyer the Government looked again at the rules. And aimed to tighten them up.

My former colleague Sir Edward Clay has come out especially strongly against this move:

It remains to be seen whether future retirees will flout the FCO’s legally dubious gag; the FCO clearly intends to hear progressively less from its retired and senior members, unless it approves of what is uttered. It suppresses valedictory despatches from retiring ambassadors, afraid of criticisms. There have been whispers of an attempt to get mandarins to sign over copyright on anything they write – novels and poetry, as well as despatches.

The FCO tells retirees that the rules applying to their serving colleagues also apply to them, for ever. Books, articles and lectures have got to be cleared months ahead. But the real rub comes with the requirement to give five days’ notice of what they intend to say in any appearances on, or articles in, the media: any public comment based upon any of their professional experience is covered, far broader than previous strictures on official secrets or confidentiality. Unspecified civil or criminal proceedings are threatened for transgressors.

Sir Edward’s and other vigorous interventions have prompted Parliament to take a look. The HoC Public Administration Select Committee is expected to pronounce today. A trailer.

In case you are wondering, before I left the FCO I told them that I was planning to write this Blog. I would use my judgement as to what I did or did not publish. I did not plan to seek publicity for myself via self-indulgent gossip or hot policy ’embarrassing revelations’, mainly as I had none to reveal.

Rather I planned to talk about the diplomatic and political world in a quizzical, sometimes sharp way, to cast light on processes in public life and the professional dilemmas that arise.

Sounds good to us, they said.

Not a peep from them since.

Basically, the argument from some former Ambassadors is that they can not trust the Government to enforce these rules fairly.

Is not the problem that the Government these days can not trust senior civil servants to respect them?

Whence this decline in mutual trust?

A fish rots from the top.