WDA(H) Guide
WDA(H) Variations: When UK Wholesale Dealers Need to Notify the MHRA
This article explains common situations where a WDA(H) holder should consider whether an MHRA licence variation, personnel update or documented GDP impact assessment is needed.
A WDA(H) is not a one-off application. Once authorised, UK wholesale dealers need to keep the licence and the supporting GDP quality system aligned with how the business actually operates.
Why WDA(H) variations matter
The MHRA expects licence details, named personnel and authorised activities to remain accurate. If your business changes sites, activities, key personnel or operating model, the regulatory position should be checked before the change goes live.
The official MHRA application guidance states that new manufacturer or wholesaler licence applications should take 90 working days to process. Variations to licences should take 30 working days, extended to 90 working days if the variation requires an inspection.
Changes that should trigger a variation assessment
Changes to premises, storage areas, authorised activities, legal entity details, Responsible Person arrangements, named staff or subcontracted GDP activities can all affect your WDA(H) control strategy.
Not every operational change will need the same regulatory action, but every significant change should be assessed, documented and approved through change control.
Responsible Person changes need particular care
The Responsible Person is central to GDP oversight. A proposed change to the Responsible Person, deputy arrangements or RP availability should be assessed for licence impact, business continuity and evidence of competence.
Do not treat RP changes as a simple HR update. Check the MHRA route, document the handover and ensure the outgoing and incoming arrangements maintain adequate GDP oversight.
GDP impact assessment before submission
Before submitting a variation, map the change against your QMS, SOPs, training, supplier/customer qualification, temperature control, complaints, recalls and self-inspection programme.
This makes the submission more coherent and helps avoid a gap between what the licence says and what your team actually does.
Internal links for further preparation
For wider readiness, review the GDP audit checklist, WDA(H) application guide and Responsible Person requirements article. These help connect the regulatory submission with day-to-day GDP controls.
Official sources used
How SwiftGxP can help
If you need practical QA support, I can help with:
- WDA(H) variation readiness reviews
- Responsible Person change-impact assessment
- GDP change-control and documentation review
- Pre-inspection preparation for changed operations
Important regulatory note
General guidance only
This WDA(H) variations and MHRA notifications article is general guidance and is not regulatory advice. It should not be relied on as specific advice for your organisation.
GDP, WDA(H) and Responsible Person expectations can vary depending on your authorised activities, site arrangements, suppliers, products and quality system. If you need advice for your circumstances, please get in touch with Miglė to discuss your requirements.
Ask Miglė for specific advice