Fridge temperature

I have a fridge thermometer given out by the local Council.
According to them the ambient temp should be 5°.

They hand them out in the local supermarkets every Christmas to try and prevent food poisoning. A great idea!

Do you all regularly check the temperature in your fridges, to see if they are as cold as you think?
I know some fridges have an inbuilt thermometer and temperature display, but many don't.
We got rid of our old fridge last Christmas, when we suddenly realized that it wasn't as cold as it should be (average 7° - 9°), but its replacement isn't exactly perfect either!

3-5 is recommended on the food hygiene certificate and -18 for the freezer.

Between 3&4

Yes 3 in ours too.

Mines 4 do you think that's too high

+3 usually.