Section 6

The First Hundred Days

The institutional architecture described in Section 5 takes years to build to full capability. The first steps that begin that building can be taken in the first hundred days after a political decision to proceed. This section sets out what those first steps should be for government, and in parallel what Members of both Houses can do to accelerate the timetable and to hold ministers to account as the programme proceeds.

6.1 What government should do

Weeks 1–4 · Political architecture

The first four weeks should establish the political architecture that will sustain the programme through its subsequent difficulties. This requires a published ministerial statement — signed jointly by the Defence Secretary, the Chancellor, and the Cabinet Office minister — that commits to the architecture, names the accountable officials, and sets out the fiscal and institutional envelopes. This should be specific, costed, and naming individuals; it should be forthright about the risk tolerance being accepted and about what will be done differently from established practice.

Parallel to the public statement, the Prime Minister should write to the Chairs of the Defence Committee, the Public Accounts Committee, and the relevant House of Lords committees, setting out the architecture and requesting early engagement on the oversight model. National Audit Office senior leadership should be briefed on the same basis. This is not a courtesy but a strategic requirement: parliamentary and audit bodies are capable of being allies of institutional innovation if they are engaged early, and are capable of defeating it if they are not.

The implementation compact. The Permanent Secretary of the Ministry of Defence, the Second Permanent Secretary, and the National Armaments Director should jointly sign an implementation compact committing their departments to the non-standard terms the architecture requires. This compact should be published. Absence of this compact is the single most common failure mode of reform initiatives in British government.

Month 2 · Organisational foundation

The second month establishes the organisational foundation. The Defence Technology Cluster should be incorporated as a company limited by guarantee, with the Ministry of Defence, the Department for Business and Trade, and the Cabinet Office as members. Interim leadership should be appointed on a six-month basis pending open competition for permanent appointments. Initial staffing should target thirty people within sixty days.

A National Security Council sub-committee on Defence Technology, chaired by the National Security Adviser, should be established to handle fast decisions and escalate blockages to the Prime Minister directly. A memorandum of understanding with the Government of Ukraine should be negotiated, covering access for UK personnel to Brave1, DOT-Chain Defence, and DELTA, reciprocal access for Ukrainian personnel to UK defence-technology programmes, and the specific terms for any DELTA licensing.

Month 3 · First visible outputs

The third month produces the first visible outputs. Three contract rounds should be issued simultaneously by the Defence Technology Cluster:

Small unmanned aerial systems — 15–20 manufacturers onboarded through dynamic purchasing system, initial volume 20,000 units across varied specifications.
Counter-UAS systems at unit level — 5–8 manufacturers, initial volume 500 units.
AI-first battle-management modules — 3–5 suppliers, initial contracts of £2m–£10m each, six-month development and testing horizon.

The contracting terms should be published in full, as a demonstration of the departure from established practice and as a reference for subsequent rounds. The first brigade-level pilot of end-user selection authority should begin in month three.

Day 90. A published progress review should report honestly on what has been achieved, what has encountered difficulty, and what requires decisions at the political level. This review should be written by the Defence Technology Cluster leadership, published in full, and submitted to the relevant parliamentary committees.

6.2 What Parliament can do

Parliamentary action is material, not ceremonial. Several distinct contributions are available.

Members of the Commons can press the government through oral and written parliamentary questions on the specific implementation timetable, on the Defence Investment Plan's publication date, and on the architectural principles to be adopted. Indicative question texts are in Annex C. The Defence Committee can commission a short focused inquiry on "Adopting Ukrainian Defence-Technology Lessons: Institutional Architecture" that would provide the pressure for the government to set out its position in evidence. The Public Accounts Committee can request an early hearing with the National Armaments Director on the readiness state of the supporting machinery referenced in the December 2025 RAeS analysis.

Members of the Lords can table questions for short debate on the Defence Investment Plan and on the architecture to which it will respond. The Lords Defence Committee can commission a deeper inquiry of the kind that Committee has traditionally done well — less politically charged than the Commons and with space for the detailed institutional argument this paper sets out. Peers with technology-sector backgrounds are particularly well placed to press on the staffing and governance model of any Defence Technology Cluster.

Both Houses can use the Estimates process and the Armed Forces Bill cycles to press for architectural commitment. Backbench debates in the Commons on defence procurement reform can be timed to coincide with key publication milestones. Cross-party letters to the Defence Secretary, signed by Members with defence, digital, and industrial backgrounds, carry specific weight.

The most important parliamentary contribution is the least procedural: sustained attention. Procurement reform initiatives fail in the United Kingdom principally because parliamentary attention moves on before the architecture is locked in, permitting the ordinary pressures of civil service reabsorption and prime-contractor lobbying to reverse gains over time. Members who return to the topic over successive sessions, across reshuffles and personnel changes in the Ministry of Defence, make reversal substantially harder. The equivalent British condition requires parliamentary stewardship.