Bricks above DPC

MikeJXE

Something not good when a brick shears in half 

It's already been advised get a structural engineer out 

BJV

I am no structural engineer but your house has had a lot of movement.

A LOT

Hairline cracks could be plaster drying etc perfectly normal, but they are not small. 

You need to make a complaint to your housing association and show them the pictures if they have not seen them already. The size of the crakes is not something that they should ignore.

Try your local citizen's advice as they should know the housing association and may be able to help.

I don't know how possible this is but you need a structural report. Removing a wall and not supporting it correctly puts pressure on the house and the building in ways that were never meant to happen. It could cause lots of issues and although I am speculating it could have caused the crakes you are seeing. 

Also, speak to your local council shelt also has a system to complain, but don't ignore the crakes they are not going away. https://england.shelter.org.uk/housing_advice/council_housing_association/complaints_about_councils 

weeg

As others have said, you really need an engineer to come out and take a look. The issue isn't the bricks, it's whatever is causing the underlying problem.