Is this a structure damage or just a crack 

Put the cove back up 

Difficult to tell what's going on;  plasterboard or lath and plaster?  If it was under coving, it might never have been finished properly.

Yeh thing is cove keep falling g down due to distemper and obviously if we had chose not to cove this would still be there so what do you suggest any good or not 

No it was not covered we loved it and discovered this just put cove back up but obviously when fell down was still there thanks 

Cover it that ment to say

The property is 1960 would it be lath and plaster ?

If it original it will be 

Its 60 year old property just bought and has no end of problems 

So what’s above the crack?

 

Loft?

another flat?

just taken a wall down and plastered up?

just to get an idea, as you don’t provide a lot of supporting evidence, would be good if you described the room, timber floor, concrete floor? Wall construction 

 

There is a loft above and t&g  floor and wall construction is brick

So what’s above the corner where the big crack is? 

This is a bedroom joining onto another property with a tiled roof 

So is there anything in the loft looking strange above the crack?

 

 

It just an empty loft with insulation 

Unless its lath as not looked under insulation 

Not to worry, I will have a look!

Ok

Going to check the attick out today and see what is happening 

14 hours ago, Diy said:

The property is 1960 would it be lath and plaster ?

Probably not. 

So what is in the picture then as can see wood 

Just 9m board in attick

37 mil buy 70 fathers in attick as well so very small 

1 hour ago, Diy said:

37 mil buy 70 fathers in attick as well so very small 

 

sorry you need to explain what this means?

37mm width and height 70mm  and 9cm plaster board sorry productive text also a big sag in middle of ceiling