Probably not a problem that will be solved on here but would appreciate soem
advice before I call an expert in.

Woek up this morning and the window in the bathroom has jammed.

It looks something like this but going upwards.

http://www.cleverd.com/prodimage.php?id=255

If I pull the handle the lock opens up and if I push outwards then the top
half of the window starts to open but the bottom half is totally stuck.

I have tried bashing it with a hammer and sticking a screwdriver in to pry
it apart but no luck.

I am thinking that maybe the actual runner type things inside have broken -
hard to explain but when you pull the handle there are 2 sets of locks (top
and bottom) that slide upwards that allow to window to open.

Problem is I see no easy way to fix this without totally having the window
pulled apart!!