Cracks around windows

[Gmjx]

Hi people. I have been living in a 70’s house for 7 months and noticed hairline cracks around the edges of old windows (over 20 years at least) but I’m worried that this is potentially a structural issue. Can anyone advise me on this it’ll be greatly appreciated. Images attached. First pic is upstairs rest downstairs.

Ps… upstairs was plastered end of august. Also cracks between ceiling and wall.

Last image is most worrying to me

 

[^woody^]

They look like common shrinkage cracks from several possible reasons other than structural movement.

Structural cracking with get wider and wider and be on the outside too.

 

[Gmjx]

Appreciate the response Woody. Btw just to clarify I’ve looked at the last one nearly 2 months and no change. Also nothing on the outside that looks “alarming”.

 

[^woody^]

They are really common. Typically it's caused by heating and humidity and sudden or excessive changes (inside or out), and it's a phenomenon which can occur any time even after many years.

It's effectively a sudden "snap" and that's it.

Once confident that is not ongoing, repairs will need mesh in the plaster as otherwise if just filled they tend to reappear.