The MHRA and the HPRA both apply the same 2013 EU Good Distribution Practice text, so a wholesaler working in Great Britain and Ireland is held to one underlying standard. What differs is how each regulator has written up its expectations: the HPRA in formal numbered guides with specific figures, the MHRA mainly in Guidance Note 6, GOV.UK guidance and Inspectorate blog posts. The one thing to remember: read each regulator's own material for each site, and where the published detail differs, meet the more specific written expectation and record why.
Why they differ
One text, two ways of explaining it
The common baseline is the European Commission's Guidelines of 5 November 2013 on Good Distribution Practice (2013/C 343/01). The text sets principles, such as mapping storage areas 'under representative conditions', and leaves each national authority to explain how it reads them. That is where the two regulators part company in style.
The HPRA publishes formal, numbered guides. IA-G0011 (2020) is a dedicated guide to temperature control in storage and transport. IA-G0046 (April 2025) works through the EU guidelines chapter by chapter and says wholesalers should comply in full with both. IA-G0008 (August 2025) covers wholesaling and brokering, including inspections.
The MHRA's material is spread across Guidance Note 6 (licensing, the Responsible Person, deficiency classes), its GMP and GDP guidance on GOV.UK, the Green Guide, and Inspectorate blog posts from 2016 to 2020 on mapping, refrigerated products, freezers and transport. The MHRA does not publish a document equivalent to IA-G0011, and it has not restated the blog positions as formal guidance on GOV.UK.
The legal position in brief
In Great Britain, regulation 43 of the Human Medicines Regulations 2012 requires a licence holder to comply with the guidelines that apply under regulation C17. Until the MHRA publishes its own, those are the Commission guidelines as they applied immediately before 31 December 2020, which in practice is the 2013 text held at that date. The MHRA has not used that power: it has not consulted on a GB guideline, and GOV.UK still lists the 2013 EU text and the Green Guide (2022).
Northern Ireland differs: regulation 43(1)(b) points to the guidelines the European Commission publishes, so the live EU text applies, while the MHRA states it 'remains the national competent authority in Northern Ireland' (Windsor Framework guidance). In Ireland, S.I. No. 538 of 2007, as amended (including by S.I. No. 164 of 2013, the (Amendment) Regulations 2013, and most recently by S.I. No. 415 of 2022, which gives the collective citation 'Regulations 2007 to 2022'; IA-G0046 names 'Regulations 2013', a title that does not exist, but its description matches IA-G0008's description of the 2007 Regulations), requires wholesalers to comply with EU GDP, and the HPRA grants, suspends and revokes wholesale authorisations. IA-G0011 describes EU GDP compliance as the 'minimum requirement' for a licence.
Operating in both
What this means if you trade in GB and Ireland
Each site needs its own authorisation, because the HPRA can only grant a WDA for activities in Ireland, and each storage area needs its own mapping, because EU GDP 3.2.1 requires mapping of 'the storage area before use'. Each inspector will read your system against the material their own regulator has published, so the same SOP may be questioned on different points in Dublin and in Great Britain.
The two inspectorates find problems in the same places. At its GDP Information Day on 3 May 2022, the HPRA listed Major deficiencies by 'percentage frequency': 'Management of temperature at the site was deficient' 87% and 'Mapping studies were not performed correctly or not at all' 79%. Its transport slides gave 51% for missing or insufficient transport validation or risk assessment (including unvalidated seasons or routes), and 23% for excursion investigation, reporting and passive-shipper deficiencies, among Major transport deficiencies. The MHRA's last full data set, for 2016, put transportation at 13% and temperature control at 9% of sampled inspections with a Major, and it has published no temperature breakdown since. The years and units differ, so the figures show where to look, not which regulator is stricter.
Escalation works in a similar way on both sides. The MHRA refers serious or unresolved findings to its Inspection Action Group, with a compliance escalation process below that. Newsletter 73 (February 2023) reports that the HPRA has implemented the EU compliance management process through a Compliance Regulatory Group, for wholesalers (and manufacturers) whose compliance is below standard (Newsletter 73). The MHRA does not publish GDP non-compliance statements for GB sites, while HPRA ones appear in EudraGMDP.
Some differences are about people. Guidance Note 6 asks for at least one year's practical experience for an RP; IA-G0046 treats six months' full-time direct GDP experience as the minimum (RP experience). The Responsible Person (import) is a GB-only role. Both regulators have published 'storage of products requiring refrigeration at ambient temperatures' as a possible Critical example (MHRA Guidance Note 6; HPRA GDP Information Day slides, 2022). The current HPRA web page names failure to meet storage and transport conditions as a Major example. Either regulator can escalate a finding on its seriousness, so the examples do not predict how a given case will be graded.
| Control | HPRA guides | MHRA published material |
|---|---|---|
| A dedicated temperature guidance document | ✓ | · |
| A time limit for storage in transit | ✓ | ✓ |
| Excursion defined as any duration | ✓ | · |
| Mapping empty and full | ✓ | ✓ |
| Mapping to cover seasonal variation | ✓ | ✓ |
| Listed equipment re-mapping triggers | ✓ | · |
| A minimum number of calibration points | ✓ | · |
| Monthly RP review of temperature records | ✓ | · |
| Cross-GxP data integrity guidance | · | ✓ |
A tick means the point is written in that regulator's own published material (HPRA IA-G0011, IA-G0046; MHRA Guidance Note 6, data integrity guidance, Inspectorate blog). An empty cell means we did not find it written there, not that it is not expected.
Three worked differences
Storage in transit: 36 hours and 48 hours
MHRA policy, set out in the refrigerated products blog, part 1, is that a site need not be on a licence if ambient products are held there in transit for under 36 hours and ownership has not passed. Refrigerated products need a licensed site even for shorter periods, unless they stay overnight in continuously refrigerated vehicles. IA-G0046 says storage for more than 48 hours in transport, or any storage of refrigerated product regardless of time, is storage that needs a WDA; IA-G0008 words the refrigerated case more softly.
In an illustrative case, a courier holds refrigerated stock overnight in a depot cold room. In Great Britain the depot needs to be licensed because the stock has left the vehicle; in Ireland, any storage of refrigerated product points the same way. The ambient thresholds differ, so the same overnight hold can be treated differently either side of the Irish Sea (36 or 48 hours).
Excursions: any duration, or noted when very short?
IA-G0011 defines an excursion as a departure from labelled conditions 'for any duration of time'. The RP is told immediately, stock is quarantined, the manufacturer is consulted, the investigation and CAPA are documented, and the HPRA is told at once if a recall may be needed.
On the MHRA side, a 2018 reply on the Inspectorate blog says very short excursions, around five minutes or under, are not typically raised as individual formal deviations but should still be noted. It is a reply to a reader's comment, not formal guidance. The 20-minute figure used by SPS and UKHSA belongs to clinical settings, not wholesale (any duration, 5 or 20 minutes).
Mapping: listed triggers or a justified risk assessment
IA-G0011 says warehouses should be mapped empty and full, in summer and winter, and cold rooms on installation, empty and full, with an ambient probe outside. It lists re-mapping triggers: refrigeration repairs, layout or set-point changes, changes to duty and back-up condensers, moving a fridge, and heating changes.
The MHRA mapping blog recommends mapping empty, with dummy product if needed, then fully stocked, repeated for seasonal variation, and asks the operator's risk assessment to define and justify how often mapping is repeated. In substance the two largely agree, and neither sets a fixed interval (re-mapping frequency, seasonal mapping of cold rooms).
One quality system
Building one system that works for both inspectors
Neither regulator publishes a method for running one system across both countries, so what follows is a reasonable approach drawn from their texts, not legal advice. Write the core SOPs to the EU text both apply. Where one regulator's published guidance is more specific, meet that expectation across the business unless there is a reason not to, and record the rationale, so either inspector can see why you work the way you do.
Keep what is genuinely local in regional annexes: transit thresholds apply in the country where the depot sits, and Northern Ireland sites follow the live EU text.
- Map each site separately, planned to cover empty and full, summer and winter, and the problem areas the MHRA blog lists.
- Record every excursion, however short, and classify it using thresholds written in your SOP.
- Calibrate probes across their range of use and document the points chosen.
- Set and record the RP's review of temperature records, with its frequency justified.
- Check each RP against each authority's own experience criteria.
- Hold one change control list that also names your re-mapping triggers.
In summary
The short version
- Both regulators apply the 2013 EU GDP text: GB as held at 31 December 2020, Ireland and Northern Ireland as the EU publishes it.
- The HPRA writes detail into numbered guides; the MHRA into Guidance Note 6, GOV.UK guidance and blog posts.
- Read each regulator's own material for each site you hold.
- Transit storage, excursion duration and mapping triggers are worded differently: know both.
- Where one is more specific, meet it and record why.
- Keep country-specific thresholds in regional annexes to one core SOP.
- Map each site, record every excursion and check RP criteria against both texts.