Which dog?

I would get in touch with your local rescue there are so many fabulous dogs which would suit. One of my foster dogs at the moment is a lurcher and she's fantastic. Lovely docile temperament which is very typical of them. She's very trainable with food.

What a load of nonsense 😄

Your list is mainly stuff you can train and not really breed specific. If you want a kid friendly dog Id go for something calm. We have a jach russel mix atm and shes very wild and mouthy. Its fine with my kids because they grew up with dogs and they know how to handle her, but i wouldnt leave her alone with just any kids.
Shes still very young though (just turned 1), so we are still training her.

Border Terrier ,best dog ever

Exactly - the staffies I know would be more likely to lick another dog to death (while wriggling in excitement!) than to attack them.

The bigger staffie mixes around here are usually a) bred deliberately for maximum aggression and b) owned by people who want a status symbol rather than a well trained family pet

Smooth or rough collie tick all those boxes.

Some are ok- I grant that.
My friend has one ( a rescued one) he is fine with other dogs.
He’s lovely.

Probably a purebred isn’t as bad- lots of Pit mixes about.

Thing is. These 'staffies' which attack are rarely actually properly bred Staffordshire bull terriers and just a mix which have been raised wrong

Mainly for attacking other dogs.. We are out now and have been warned about a man ( scrawny) with two large staffies he can’t control who have caused serious injuries to local dogs.

Wirehaired Vizsla. If you’re previously a ‘lab person’ wanting something a bit different then you can’t really go wrong.
Affectionate, mega keen to please, will let you know that someone is outside, can go all day but equally happy to have a chill day. The most versatile and loving breed I’ve come across. I’ve never known one not adore children and they just aren’t interested in pissing off so running away isn’t really in their nature.
They can be a bit taller than a lab so not sure if suits your ‘medium’ brief but they do fold up/curl up very small!

I must say. I'm chuffed with the staffie love. I thought I'd get shot down for that suggestion!

My sister has always had staffies and they’ve all had a great temperament - lots of energy, good with kids and tick all the boxes on your list. I have a cockapoo which would also tick your boxes, despite the snobbery around cross breeds. Mine doesn’t need 2 hours of walking though, a good run around in the morning and a couple of toilet breaks and he’s a happy pup. He does bark at people he doesn’t know coming up the path - he’s not unhappy though, just hopeful of a treat.

Staffy

Gorgeous!

I must say I'm loving all the staffie suggestions on this thread, they often have such a bad (undeserved) reputation 😊

Staffie all the way. All the ones I've known (including my girl) have been lovely, friendly, affectionate, happy little things with a big bark when needed. Amazing with kids and other animals and easy to train.

The only issue MIGHT be destruction of things when left home alone 😬

An hour in the morning and an hour in the afternoon is not a lot of walking for a dog! Especially if it's a working cocker cross. I'm a dog walker and the amount of dogs I know that barely leave the house especially if the weather isn't lovely is just sad. Dogs love coming to stay with me because I'll take them out 3 times a day, not always for an hour but they just love to be out and about. Then they love to chill on the sofa with me in between. There's only so long any indoor stimulation lasts or keeps a dogs attention. I grew up on a farm though where the dogs roamed all day long. They were the happiest dogs ever.

Obligatory photo obviously!

Cockapoo. Had ours a year and he fits the description above. Plus cute as hell and a bundle of love and fun

bichon

Staffie. We have always had them and they a cross between a bundle of energy and a coach potato. They don't really grow up til they are about 2 or 3 though and can be slightly bonkers til then but I think in a good way.
They are the biggest snugglers though most evenings I can be found under my two who's combined weight is around 6 stone. They think they are chihuahuas though!

Ignores squirrels on command-

Bruh

Another vote for border terrier. My parents is the best trained clever little thing ever. Excellent recall, ignores all other dogs, sheep, cows, horses. The only thing he isn’t keen on is cats. He loves all children and get loads of attention when out in the village and everyone knows him. Not barky, only get a bit excited when the door goes, but only because he is so excited see people. Will makes sneeze noises on demand 😂

I agree with Terrier, my sister’s Border ticks all of those boxes.

The spaniel as others have suggested BUT only if you are prepared for lifelong training, and I mean lifelong.

There is a saying... a labrador is born half-trained and a spaniel dies half-trained. Be warned, they are rewarding but hard work.

Whippet. We had one for years, he was a rescue who came to us as a very young pup, he was fantastic, loved to cuddle up on the sofa and was known locally as the kangaroo because he jump to look over the high wall when people walked by. We fostered lots of dogs and he welcomed all of them but so did our dobermann. I recommend dobermann but they do need training, exercise and a decent sized garden but overall are fantastic family pets.