In the fridge or not in the fridge?

Eggs - yes.
Ketchup and HP - no.
Mayo - yes.
Grapes and other casual pick-one-up fruit - yes.
Onions - no.
White wine you don't plan to drink soon - no.
Opened jam and marmalade - yes.
Tomatoes - yes.
Butter in winter - no.
Pickles and capers in jars - no.
Easy garlic and tomato puree in tubes - yes, once opened.

Eggs - yes but you shouldn't/don't need to
Ketchup and HP z no
Mayo - not fresh made PseudoHellmans - yes
Grapes and other casual pick-one-up fruit - no
Onions - no
*White wine you don't plan to drink soon - no
Opened jam and marmalade - yes but no need
Tomatoes - yes
Butter in winter - no
Pickles and capers in jars- yes but no need
Easy garlic don't buy and tomato puree in tubes - yes

Some of it is lack of cupboard space. I like pickles and mayo cold.

I am sure eggs in Uk should be stored outside the fridge but guidance in the US is to put them in the fridge because they have been washed/treated which affects their life

American eggs in the fridge. British ones not. Iirc American eggs are washed which destroys the protective coating on the shell. British flocks are vaccinated against salmonella rather than the eggs being washed so are fine out of the fridge.

Eggs - not in fridge
Ketchup and HP - in fridge once opened
Mayo - not fresh made. - in fridge once opened
Grapes and other casual pick-one-up fruit - depends on how ripe they are, what the fruit is etc. grapes and berries are in the fridge in our house.
Onions - cupboard
*White wine you don't plan to drink soon - in fridge for emergency
Opened jam and marmalade - fridge
Tomatoes - depends how quickly you are going to eat them! I usually keep mine in fridge for longevity but taste so much at room temp.
Butter in winter - out of fridge.
Pickles and capers in jars - fridge
Easy garlic and tomato puree in tubes - fridge once opened

I agree with most peoples lists except for I have never ever put jam or ketchup in the fridge.

I knew people put ketchup in the fridge sometimes but I'm mildly shocked by the jam and how many people say fridge for that. I've never even considered it.

Onions and tomatoes shouldn't be in the fridge as refrigeration ruins the flavour.

Eggs preferably not refrigerated but can be kept in the fridge as long as they are allowed to get to room temperature for several hours prior to cooking.

Jam, marmalade, butter, HP, Ketchup and Mayo do not need to be in the fridge, even after opening as long as you don't intend to keep them for several months.

All other things on the list, in the fridge after opening.

Eggs - not in the fridge
Ketchup and HP - not in the fridge
Mayo - not fresh made - in the fridge
Grapes and other casual pick-one-up fruit - in the fridge, other things like plums in tge fridge if they're ripe- apples and orages not in the fridge
Onions - in the fridge
*White wine you don't plan to drink soon - in the fridge if theres space
Opened jam and marmalade - in the fridge
Tomatoes - in the fridge
Butter in winter - not in the fridge if its used daily
Pickles and capers in jars - in fridge if open
Easy garlic and tomato puree in tubes - in fridge if open

I store tomatoes out the fridge in summer but for most of the year, they're tasteless and I only really use them in cooking so they go in the fridge then.

Agreed! Everything except eggs and butter.

Edited to add, onions are a root vegetable and don’t need fridge either.

All in the fridge

Except for

fruit (only grapes and berries in fridge)
unopened stuff in jars /tubes
onions

The voice of reason has spoken

Easy! The condiments and jams all say fridge after opening.

white wine, onions, eggs don’t need to be in the fridge but can be if you prefer.

I agree

I don't like tomatoes and neither does dp. We just buy them for my youngest, who only likes them 'crunchy'. Left out they go soft and then he won't eat them

All of that in the fridge. A small bit of butter kept out day-to-day, for a day or two max

Eggs Fridge - although I don't think they're supposed to be
Ketchup and HP - fridge
Mayo - fridge
Grapes - fridge
Onions - cupboard
*White wine - cupboard
Opened jam and marmalade - fridge
Tomatoes - fridge
Butter in winter - cupboard
Pickles and capers in jars - fridge
Easy garlic and tomato puree in tubes - fridge

All of those should be in the fridge once opened except eggs

Eggs - not in the fridge
Ketchup and HP - opened in the fridge
Mayo - not fresh made. PseudoHellmans - opened in the fridge
Grapes and other casual pick-one-up fruit - berries and grapes in the fridge
Onions - fridge
*White wine you don't plan to drink soon - cupboard
Opened jam and marmalade - fridge
Tomatoes - fridge
Butter in winter - proper butter in my butter dish on the counter
Pickles and capers in jars - cupboard
Easy garlic and tomato puree in tubes - opened fridge

Tomatoes are supposed to be stored out of the fridge for better flavour

Can’t believe all you heathens keeping tomatoes in the fridge!

Cold, hard. tasteless balls of red nastiness 🤢 vs Soft, juicy, sweet heaven.

Free The Tomatoes! 🍅🍅🍅

Eggs - fridge (because there's a holder there)
Ketchup and HP - mostly out
Mayo - not fresh made. PseudoHellmans - mostly out
Grapes and other casual pick-one-up fruit - fridge
Onions - cupboard
*White wine you don't plan to drink soon - cupboard
Opened jam and marmalade - fridge
Tomatoes - cupboard
Butter in winter - always out unless a heatwave
Pickles and capers in jars - fridge
Easy garlic and tomato puree in tubes - fridge

Eggs fridge

Ketchup and HP fridge

Mayo - not fresh made fridge

Grapes and other casual pick-one-up fruit. Grapes in fridge. Berries in fridge. Other fruit in fruit bowl

Onions fridge

White wine you don't plan to drink soon I don't drink so no idea

Opened jam and marmalade. Fridge. I left jam out once and it grew mould very quickly

Tomatoes fridge

Butter in winter fridge

Pickles and capers in jars.fridge

Easy garlic and tomato puree in tubes. Fridge. Tomato puree went mouldy when I left it out

I put ketchup, mayo, brown sauce and tomato purée in the fridge after opening.

The others never go in the fridge, (except butter in the height of summer).

But our kitchen stays fairly cool most of the time.

Eggs NO
Ketchup and HP YES
Mayo - not fresh made. PseudoHellmans YES
Grapes and other casual pick-one-up fruit YES
Onions NO
Opened jam and marmalade YES
Tomatoes YES
Butter in winter YES
Pickles and capers in jars YES
Easy garlic and tomato puree in tubes YES