MHRA GDP and Green Book temperature checklist

October 18, 2026
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Storing medicines and vaccines: what the GDP guidelines and the Green Book expect

A summary of the source documents, which inspectors work from. Part A is for wholesale distribution (WDA holders). Part B is for vaccine fridges in pharmacies and GP practices.

Part A: GDP for WDA holders

(EU GDP guidelines 2013/C 343/01, applied in Great Britain by the MHRA; Human Medicines Regulations 2012, reg. 43)

Storage areas (3.2.1)

  • Map each storage area before use, under representative conditions.
  • Place the monitoring where the mapping found the extremes.
  • Re-map after significant changes to the facility or the cooling equipment, or as your risk assessment sets.
  • For small rooms at room temperature, assess the risks (heaters, for example) and place the monitors to match.

Equipment (3.3)

  • Calibrate the monitoring equipment at defined intervals, set by risk, and traceable to national or international standards.
  • Have alarms that alert you to excursions from the storage conditions, with levels set appropriately.
  • Test the alarms regularly, and keep the record.
  • Carry out repairs and calibration without putting stock at risk, and keep records.

Computerised systems (3.3.1)

  • Validate the monitoring system before use, and keep a written description of it.
  • Only authorised people can enter or change data, and the data is protected.
  • Back up the data at regular intervals, and keep the backups for at least five years.

Transport (9.2)

  • Hold the storage conditions in transit.
  • Report any excursion to the distributor and the recipient.
  • Have a written procedure for investigating and handling temperature excursions.

Quality oversight (chapter 2)

  • Your Responsible Person reviews each excursion and records the decision on the stock.

Part B: Vaccine fridges

(UKHSA, the Green Book, chapter 3)

The fridge

  • Use a specialised pharmaceutical fridge. Ordinary domestic fridges must not be used.
  • Store no food, drink or clinical specimens with the vaccines.
  • Give each fridge a unique ID, keep it locked or in a locked room, leave room for air to circulate, and protect the plug.
  • Have a maintenance contract with at least yearly servicing and calibration of the temperature gauge.
  • Keep records of servicing, defrosting, cleaning, calibration and electrical testing.

Monitoring

  • Keep +2 °C to +8 °C, aiming for +5 °C.
  • Use at least one max–min thermometer that is independent of mains power, calibrated annually.
  • Read and record at least once each working day, at the same time, on a standard form, and sign each entry.
  • Follow the four Rs: read, record, reset, react. Reset after each reading, and act on anything outside +2 °C to +8 °C, recording what you did.
  • Keep the records for at least one year. Five years will generally cover a vaccine's full storage history.

If the fridge fails or goes out of range

  • Keep the door closed until you've assessed the situation.
  • Find the last reliable reading, and the time and cause of the change.
  • Quarantine the affected vaccines in the cold chain, labelled, and don't use them until advised.
  • Report it through your local incident scheme, and record every detail.

Where a logger helps:

  • A max–min thermometer shows the extremes since the last reset, but not when they happened or for how long.
  • A continuous logger shows both, which is what an incident assessment needs.

Sources:

Want us to go through it with your records?

Book a free 20-minute compliance check: we look at your current records, alarms and calibration against this list and tell you what an inspector would ask about. Book a 20-minute check or call 0121 794 8092.