Procurement Policy Note 04/21: Applying Exclusions in Public Procurement, Managing Conflicts of Interest and Whistleblowing · first published 20 May 2021
PPN 04/21 is a reminder and update for central-government buying teams on two obligations: (1) correctly applying rules that can exclude a supplier from a procurement (e.g. for criminal convictions, tax irregularities or past poor performance), and (2) preventing, identifying and fixing conflicts of interest. It updates the earlier PPN 01/19 to reflect post-Brexit changes to procurement regulations and adds supplementary guidance, FAQ answers and case law examples. It was prompted by National Audit Office and Boardman Review findings published in late 2020. This document is primarily addressed to buyers, not suppliers — but small businesses need to understand what buyers are now scrutinising more carefully, because exclusion grounds and conflict-of-interest checks directly affect whether a bid is accepted or rejected.
WHO THIS APPLIES TO
THE ENKII VIEW
For SMEs, the risk is practical: buyers have been told to apply exclusion grounds more rigorously and to deepen their conflict-of-interest processes, meaning any undisclosed past issue (tax debt, legal conviction, director disqualification, or a personal connection to the buyer) is more likely to surface and lead to exclusion. The upside is that cleaner, well-documented SMEs face a more level playing field if larger incumbents with hidden conflicts are now more likely to be challenged. Because full document text was not available, SMEs should read the underlying guidance directly to confirm specific exclusion grounds that apply to them.
1. Audit your own exclusion risk before bidding: check for any unpaid taxes, director disqualifications, criminal convictions, or prior contract terminations — these are the grounds buyers have been told to scrutinise more rigorously.
All SMEs bidding for central-government contracts — The PPN deepens buyers' understanding of exclusion provisions, meaning issues that previously slipped through are more likely to trigger rejection.
2. Proactively disclose and explain any historic issues in your Selection Questionnaire (SQ) response, including what steps you have taken to self-clean (remedy the problem).
All SMEs bidding for central-government contracts — Buyers are now applying exclusion grounds more carefully following NAO and Boardman Review findings; an unexplained issue is riskier than a transparently managed one.
3. Declare any relationship — personal, financial or professional — with individuals involved in the procurement, even if you think it is minor, to avoid being excluded for undisclosed conflict of interest.
SMEs with any personal or business connection to staff at a buying organisation — Buyers have been told to enhance their processes to identify and remedy conflicts of interest; undisclosed connections are now more likely to be discovered and could lead to exclusion.
4. Read PPN 01/19 alongside PPN 04/21, as the earlier note contains the foundational exclusion and conflict-of-interest rules that this PPN updates — understanding both gives you the full picture.
All SMEs — PPN 04/21 explicitly builds on PPN 01/19; the core rules and specific exclusion grounds are set out there.
Every rule below quotes the official document verbatim.
This PPN applies to In-scope Organisations (central government departments, agencies and NDPBs) and builds on the earlier PPN 01/19 on the same topic. (In-scope Organisations (central government departments, agencies, NDPBs), all contract values)
“Reminds In-scope Organisations of their obligations in applying exclusions and preventing, identifying and remedying conflicts of interest in public procurement.”
The guidance was revised to clarify changes to procurement regulations following the UK's exit from the EU. (In-scope Organisations, all contract values)
“clarify changes to the public procurement regulations following the UK's exit from the EU”
The PPN provides supplementary guidance, FAQs and case law examples to deepen understanding of exclusion provisions. (In-scope Organisations' commercial teams)
“provides supplementary guidance and answers to frequently asked questions to deepen commercial teams' understanding of the exclusion provisions in procurement regulations, including case law and additional support material”
Buyers are directed to develop and enhance local strategies, systems, processes and procedures to prevent, identify and remedy conflicts of interest. (In-scope Organisations, all contract values)
“further guidance to assist In-scope Organisations to develop and enhance local strategies, systems, processes and procedures to prevent, identify and remedy conflicts of interest”
The PPN was issued in line with recommendations from the National Audit Office (November 2020) and the Boardman Review (December 2020). (In-scope Organisations)
“in line with the recommendations of the National Audit Office published November 2020 and the findings of the Boardman 1 Review published in December 2020”
This briefing is enkii's interpretation of the official document — the official text always governs.
Source document © Crown copyright, reused under the Open Government Licence v3.0 via the GOV.UK Content API. enkii tracks every Procurement Policy Note and briefs changes the day they land — see all briefings.