Wet bricks after plaster removed

[Springmachine]

Hi, I had a leak in the kitchen which means the floor was soaked and has been ripped up. The plaster was slightly blown in a patch next to the worst of the leak and was pulled off at the same time.

It's an old house circa 1900's and there was 3 layers of plaster removed.

Underneath has revealed quite damp looking bricks.
More damp than I imagined they should be after the leak.

What would be the best action here?
The insurance company dealing with the leak drying have stripped out and put dehumidifiers in but not too sure this is enough to sort this wall?

We changed guttering when we moved in as it was faulty to the outside of this wall so maybe that has something to do with it but that's 18months ago now.

At some point we need to replaster and decorate and to prevent any future issues want to put some sort of breathable membrane in. Would that help?

To be honest I am more confused than ever. I have no idea what to do. No one seems to agree.

This is photo of the concert floor next to where the mains enters the house.
The blue pipe is new mains installed 2 years ago.
The middle copper pipe is hot water feed to sink above coming from boiler upstairs.
The left copper pipe is the cold feed running from the mains under the floor to join the feed upstairs .

Close up of where the damp patch on the wall is central to.
The screed appears dry. It's just the wall that looks wet. Apparently pipes don't run in the wall but diagonally in the screed. So if pipe leaking it would be tracking underneath the floor to appear in wall first?

We found an old rusty ale tribal socket back box, well buried.
This means the wall has been damp for a long time.
Still possibly from a long term slow leak or from long term damp in general

Rusty socket back box

Have you watched Peter Ward's videos?

Funny you should say that, I've just found him on my google search and I'm watching his back catalogue on there now...

I've just got home so taken another look at the copper pipe entering the screed near the mains pipe and there's duct tape wrapped around it at the point it enters the floor. That doesn't bode well?!

It could just be what's been used to protect the copper.

Got lost down a Peter ward rabbit hole this evening 👌🏻

Plumber coming this weekend to replace the pipework.

Remaining concrete being hacked off wall.

Hygrometer readings currently stable at 60% RH.

Hoping all should be ok

Good luck with it all - I hope you get it resolved.