Temperature
Food Temperature Control: The Numbers That Apply in Ireland and the UK
If your procedures say 57°C for hot holding, they came from the FDA. The figure here is 63°C, and the difference is an inspection failure.
Temperature is the control point most often failed, and one reason is that a lot of the guidance circulating online is American. If your procedures cite 135°F, 165°F or a two stage cooling schedule from 57°C, they came from the FDA Food Code and they do not describe what you will be held to in Ireland or the UK.
These are the numbers that apply here.
The figures you are held to
| Control point | Typical requirement |
|---|---|
| Cooking, core temperature | 75°C for 30 seconds, or a validated equivalent such as 70°C for 2 minutes |
| Hot holding | 63°C or above |
| Chilled storage | 5°C or below as good practice. 8°C is the legal maximum in much of the UK |
| Cooling cooked food | To below 8°C within 90 minutes |
| Reheating | 70°C for 2 minutes. In Scotland, 82°C |
| Frozen storage | −18°C or below |
Set your own critical limits against your own process and validation. These are the values most Irish and UK food businesses work to, not a substitute for the limits in your own HACCP plan.
Five degrees or eight? Both, and it matters
This trips people up constantly. In much of the UK the legal maximum for chilled storage is 8°C, while industry good practice and most retailer specifications require 5°C or below.
Running at 8°C is lawful and will still fail a customer audit. Running at 5°C gives you headroom, because a unit that normally sits at 5°C can drift during a busy service without crossing a legal limit. A unit that normally sits at 8°C has nowhere to go.
Set your critical limit at 5°C. Treat 8°C as the point where product decisions start, not as your target.
The danger zone, and the time limit inside it
Between roughly 8°C and 63°C, bacteria multiply. That is why the two holding requirements sit where they do: below the range, or above it.
Food does sometimes have to pass through the range, during preparation, service or transport. The practical rule in the UK is that chilled food may be held outside temperature control for a single period of up to four hours, after which it must be used or discarded. It cannot go back in the fridge and start the clock again.
What this means in a kitchen is that time is a control, not an excuse. If you rely on the four hour allowance, you need to record when the food came out, not just that it did.
Where each one actually goes wrong
Hot holding
Checked once at the start of service and signed off at the end. A bain marie that drops below 63°C at half one leaves nothing in the record and nobody prompted to act. Hourly checks through the service period turn this from a sign off into monitoring. More on deli and counter controls.
Chilled storage
Two manual readings a day prove nothing about the fourteen hours between them, and nothing at all about a weekend. A compressor failing at 11pm on a Friday is found on Monday morning with the stock gone. This is the strongest case for wireless monitoring, and the saving is usually stock rather than compliance.
Cooling
The 90 minute window is the requirement most often missed entirely, because nobody is watching a stock pot at the end of a shift. Portioning into shallow trays, ice baths and blast chilling all work. Leaving it on the side does not.
Display cabinets
Opened and closed constantly by staff and customers, so they behave nothing like a sealed fridge. A probe reading taken thirty seconds after the door shuts tells you very little. Continuous readings show the actual pattern.
Goods in
The one check that has to happen with a person present, because it is a decision point. If a delivery arrives above your limit you reject it, and that decision needs recording along with the reading. See goods in and traceability.
Probes and calibration
A reading is only as good as the instrument. Auditors ask about calibration, and "we check it sometimes" is a finding.
- Calibrate against ice water at 0°C and boiling water at 100°C, adjusting for altitude if relevant
- Do it on a defined schedule and record it, rather than when somebody remembers
- Sanitise the probe between products, particularly between raw and ready to eat
- Probe the thickest part or the core, not the surface
- Allow the reading to stabilise before writing it down
Where the records fail
Almost every temperature problem at audit is a records problem rather than a refrigeration problem.
- Gaps at weekends and bank holidays. The first place an auditor looks.
- Ticks instead of readings. A tick tells an auditor nothing. A figure of 12°C tells them something happened and something was done about it.
- Identical readings every day. A fridge that reads exactly 4°C for six months was not measured, it was filled in.
- No corrective action recorded. A breach with no action beside it is worse than no record at all, because it evidences that you knew and did nothing.
Temperature is the one control point that can monitor itself. Sensors read continuously, alert a named person on a breach, and escalate if nobody acts, which removes the human step from the check most likely to have gaps in it.
See wireless temperature monitoring, or digital check sheets for the manual checks that still need a person.
Frequently asked questions
What temperature should hot food be held at in Ireland and the UK?
63°C or above, for the whole service period. If you have seen 57°C quoted, that is the FDA figure of 135°F converted, and it does not apply here.
Is chilled storage 5°C or 8°C?
8°C is the legal maximum in much of the UK. 5°C or below is good practice and what most retailer specifications require. Set your critical limit at 5°C so a busy service does not push you over a legal limit.
How quickly must cooked food be cooled?
To below 8°C within 90 minutes. Portion into shallow containers, use an ice bath or a blast chiller. Leaving a covered pot on the side will not achieve it.
What temperature should food be reheated to?
70°C for 2 minutes in Ireland, England, Wales and Northern Ireland. In Scotland the figure is 82°C. Reheat once only.
What is the four hour rule?
Chilled food may be held outside temperature control for a single period of up to four hours, after which it must be used or discarded. It cannot be returned to refrigeration and given a fresh four hours, and if you rely on it you need to record when the food came out.
Do we need sensors, or is probing enough?
Manual probing on the app is valid monitoring and satisfies the requirement. Sensors cover the hours nobody is on site, which is where manual monitoring has its gaps, and they usually pay for themselves in stock rather than in compliance.
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