Regarding the appointment of a politician with no Security experience as a Head of National Security is ludicrous. Knowledge and understanding of the subject is built up over many years.
I believe this is another maneuver by Cummings to trim or shape the Civil Service, but this time he's got it very wrong, and whats disappointing is that Boris has rubber stamped it.
No wonder the polls are showing Keir Starmer is more popular than the PM at the moment.
To be fair Frost was a high ranking Civil Servant and probably is able to head that role given the required help and advice from the civil servants who will be working with him in his 'ambassador' role.
He's certainly nobodies fool that's for sure.
Frost joined the Foreign Office in 1987, and shortly after was posted to the British High Commission in Nicosia where he learned Greek and was responsible for covering Greek Cypriot politics and the Cyprus problem. In 1993, he was posted to the UK Representation to the EU in Brussels as First Secretary for Economic and Financial Affairs, where he worked on issues such as the EU Budget, the economic and financial implications of enlargement to Central Europe, and the Euro. He was then posted to the UK Mission to the United Nations in New York, where he covered Human Rights and Social and Economic Affairs.
Frost returned to London to be successively the Private Secretary to the Head of the Diplomatic Service, Sir John (now Lord) Kerr, and Deputy Head of the European Union External Department, covering international trade policy issues and relations with the Balkans and Eastern Europe.
Frost was promoted Economic Counsellor to the British Embassy, Paris in 2001, where he was responsible for reporting and lobbying on all aspects of French economic and commercial life, together with its EU policy. He returned to London to be Head of the EU (Internal) Department and then Director for the European Union in the Foreign Office
. In this period he led work on a range of economic and social issues, notably the resistance to the initial Working Time Directive, and the negotiation on the EU's multi-annual Budget framework. He was part of the UK's leadership team during its EU Presidency in 2005
From May 2006 until October 2008, Frost was the British Ambassador to Denmark
and was appointed Companion of the Order of St Michael and St George in the 2006 Birthday Honours
. He was then Director for Strategy and Policy Planning in the Foreign Office from October 2008 to October 2010
, before being seconded to the Department for Business, Innovation and Skills where he served three years as Director for Europe, Trade, and International Affairs, Britain's most senior trade policy officialFrost left HM Diplomatic Service in 2013 to become CEO of the Scotch Whisky Association,
a major trade association. Following the appointment of Boris Johnson as Secretary of State for Foreign and Commonwealth Affairs, Frost was taken on as HM Foreign Secretary's special adviser in November 2016, serving until Johnson left post in July 2018.In early 2019, Frost became CEO of the London Chamber of Commerce and Industry.
 He has also served as a public commentator on the European Union, global economic and commercial issues, and multilateral diplomacy, as a member of the Advisory Council of the EU think tank Open Europe, and as an advisor on Brexit to the devolved Scottish Government in Edinburgh.https://en.wikipedia.org/wiki/David_Frost_(British_diplomat)
I doubt that the person he's taking over from, Sir Mark Sewill had any greater relevant experience to be National Security Advisor than Frost has.
The only difference being Frost is no longer employed as a civil servant and Sir Mark was when he served in that role.