Cracked double glazing

[spoony1977]

Hi people
I woke up this morning to find the internal sheet of glass on my double glazing window (openable bedroom window) cracked from top to bottom.
I havent a clue how this could have happened - i use stick on blackout blinds as its a babys nursery window and these get hot but i wouldnt have thought hot enough to crack the glass?
So what are my options can this one sheet of glass be replaced or will the whole window need doing?
What is a reputable company to ring? (nottingham area)
Im really stumped!?

Regards

 

[big-all]

not unusual can happen any time

dependand on size £60 to £90 if they have to come out
unscrew the opener and take it to them an pick it up when complete
you will have to temporerily board up the window

 

[crank39]

Have a read of this....

http://www.thewindowman.co.uk/explode.htm