Jim wrote:
Around £50-75 for the glass. I doubt you'll get the frame out easily,
and not with the glass in-situ, though do you mean it is an opening
window, and you are taking all of the opening bit out?
It'd be easier to just remove the glass.They can be a bit stiff to get
out sometimes, but it is usually possible without breaking anything.

Yes, It's an opening window and I was looking at taking the frame and glass
out by unscrewing it from the hinge, only appears to be 6 screws holding the
unit in place. I've had a look through the forum and thought this would be
easier than tackling the beading myself.

Fair enough then, if that's the case. It can certainly be a right sod
to get the beading out; I can vividly remember the first time I ever had
to do it! For a one-off you're as well to let the glazier do it.

Having said that - thinking further, if you do it that way, you'll
probably be without a window for a few days, whereas if you can get the
beading off yourself you can then measure the dimensions of the sealed
unit, including the thickness (pretty well impossible to do with the
beads in situ) and then order up the replacement - then you don't have
to remove the window until you've got the new unit in your hands.

David