Food temperature control in UK hospitality: what the rules actually are

The boiler at Welsh Back tripped one Tuesday morning in February. Not the whole boiler, just the hot feed to the kitchen hand-wash basin. We noticed at about 9:30am and got an engineer out for the afternoon. In between, the EHO walked in for an unannounced inspection.

We had probe records, fridge logs, the lot. The kitchen was clean. But that one hand-wash basin had no hot water for roughly three hours, and the inspector clocked it within ten minutes of arriving. We went from a 5-star rating to a 4-star on the strength of that single fault, plus a couple of follow-up questions about how we'd have known if the fridge had done the same thing overnight.

That inspection is why I take temperature control seriously, and why this guide exists. The rules are not complicated. The numbers are small. But the paperwork around them, and what you do when something fails, is what separates a 5-star kitchen from a 3-star one.

Why this matters

The legal basis for all of this is the Food Safety and Hygiene (England) Regulations 2013, which sit on top of EU-derived hygiene rules that the UK kept after Brexit. The 8°C chilled storage limit is the legal ceiling. Go above it and you are technically committing an offence, even if the food is still safe to eat. The hot holding 63°C minimum is the same kind of hard line.

What an EHO actually checks is not just the temperature on the day. They want to see that you know what the limits are, that you check them regularly, and that you have a written response when something goes wrong. A blank fridge log is worse than no log at all, because it tells the inspector you have a system you are not using.

Get this wrong and the consequences range from a verbal warning, to a written Hygiene Improvement Notice, to a downgraded Food Hygiene Rating that sits on your front door and on the FSA website for the next twelve to eighteen months. The rating is what hurts. Customers actually look.

The legal numbers in plain English

Here are the numbers you need to know, and they apply whether you run a 12-seat café or a 200-cover restaurant.

• Chilled storage: 8°C maximum by law. 5°C is best practice and what most decent kitchens aim for. Set your fridge thermostat to around 3°C to give yourself headroom for door openings.
• Hot holding: 63°C minimum. This is for anything sitting on a bain-marie, soup kettle, hot counter or heated display. Below 63°C, bacteria multiply fast.
• Cooking core temperature: 75°C for 2 minutes is the standard benchmark. There are legal equivalents (70°C for 2 minutes, 65°C for 10 minutes, 60°C for 45 minutes) but 75°C is what most kitchens use because it is the easiest to hit and prove.
• Cooling: from cooked to chilled in 90 minutes or less. This is the one most kitchens get wrong. A pan of bolognese left to "cool down" on the side until close-up is well over the limit.
• Reheating: 75°C core for hot food being served again (82°C in Scotland, just to keep you on your toes).

Write these on a laminated card and stick it inside a kitchen cupboard door. Not for the inspector, for your chef when they have been on shift for nine hours and cannot remember whether it is 63 or 65.

Probe thermometers and the calibration habit we missed

For the first year at Welsh Back, we owned a probe thermometer. We used it. We wrote numbers down. What we did not do, because nobody had told us, was calibrate it. The probe sat in a drawer next to the order pad, getting knocked about, and we trusted whatever number came up on the little screen.

When we finally bought a second probe and compared them, they disagreed by 4°C. Which was the right one? We had no idea. Twelve months of fridge logs were essentially fiction.

The fix is simple and takes two minutes:

• Weekly ice water test: fill a jug with crushed ice and a little water, stir, leave it 30 seconds, then put the probe in. It should read 0°C, give or take 1°C.
• Monthly boiling water test: a rolling boil should give you 100°C, give or take 1°C (a bit less if you are at altitude, which in Bristol you are not).
• Record both: a single line in a notebook. Date, probe serial number, ice reading, boiling reading, initials.
• Replace, don't adjust: most kitchen probes are not user-calibratable. If it is more than 1°C out, bin it and buy a new one. They are £25.

If you drop your probe, repeat the test before you trust it again. This applies to the back-of-house probe and any probes built into hot holding units.

What to do when the fridge breaks

Fridges break. Compressors fail, door seals perish, condensers clog with kitchen grease and the unit runs warm for a fortnight before the alarm finally trips. The question is not whether this will happen, it is what you do in the hour after you notice.

Here is the sequence that EHOs love to see, and that we eventually got into the habit of:

• Note the time and the temperature you found it at. "Fridge 3 reading 11°C at 07:45" is gold dust. Write it on the fridge log there and then.
• Decide on the food. If the food has been above 8°C for less than 4 hours, you can move it to a working fridge and continue using it. Above 4 hours, it is a bin job. This is the "4-hour rule" and it is what saves you from binning a chiller full of stock every time the unit hiccups.
• Move the food. Walk-in if you have one, a colleague's fridge next door if you don't. We once moved half a chiller into the pub next door for an afternoon. They didn't mind, they wanted the goodwill.
• Get the unit fixed or replaced. Same day if you can. A note saying "engineer called 08:10, attended 14:00, gas re-charged, retested at 4°C by 16:30" is what closes the loop.
• Write the corrective action. This is the bit most operators skip. One line: what went wrong, what you did, when it was resolved, what food was discarded, what was saved. Sign and date it.

That corrective action record is what an inspector wants to see. It proves you noticed, you acted, and the system worked. A kitchen with zero corrective actions in twelve months is either lying or not looking.

Hot holding, cooling and the 90-minute problem

Hot holding is straightforward in theory and a pain in practice. The 63°C minimum applies to the food, not the air around it. So a bain-marie sitting at 75°C with a tray of soup at 58°C is failing. Probe the food, not the unit.

Cooling is where most cafés trip up. Stock pots, chilli, soups, curries, anything cooked in volume. The 90-minute clock starts the moment you take it off the heat, not the moment you remember to put it away. A few tricks that worked for us:

• Decant into shallow trays. A 30-litre pot will not cool in 90 minutes. The same liquid spread across four gastro trays will.
• Ice baths. A sink full of cold water with a few ice packs, lid off the tray, stir every few minutes.
• Blast chillers if you can afford one. We never could at Welsh Back, but Harbourside got one second-hand and it changed the prep schedule.
• Cook earlier. Sometimes the answer is just to start the stew at 2pm not 4pm.

If you genuinely cannot get something cooled in 90 minutes, write down what you did instead and why it was safe. That is your HACCP working in real time.

Digital monitoring is a sanity check, not a replacement

You can now buy small wireless temperature sensors that sit in each fridge and log readings every few minutes to an app on your phone. They cost £30 to £80 a unit. We put them in at Harbourside in the last couple of years and they were genuinely useful, mostly because they catch the slow drift you would not notice on a once-a-day manual check. The chiller running at 7°C all weekend because someone left the door ajar on Friday night, that kind of thing.

What they will not do is replace a probe in the food. The sensor measures air temperature, which is not what the law cares about. Use them as a backup, an alarm, a way of sleeping better on a Saturday night. Then probe the food in the morning and write that number in the log.

Common mistakes

• Logging perfect numbers every time: a fridge log where every reading is exactly 4°C for six months is a fiction, and an experienced inspector will spot it in thirty seconds. Real fridges fluctuate. Real logs should too.
• Probing the air, not the food: holding the probe in the bain-marie water tells you nothing. Push it into the thickest part of the food, wait for the reading to stabilise, then record.
• No corrective actions on file: if your records show twelve months of perfect temperatures, you have either not been looking or not been writing things down. Either is bad.
• Forgetting to calibrate after a drop: probes are surprisingly fragile. A single drop onto a tiled floor can shift the reading by 2 or 3°C. Re-test before the next service.
• Cooling food in the walk-in: putting a hot stockpot in a chiller raises the temperature of everything else in there. Cool on the bench in shallow trays first, then move it in.
• Trusting the fridge thermostat dial: the dial says 4°C, the actual air temperature is 8°C. The dial is a setting, not a measurement. Always check with a probe.