I have attached a video of a test carried out by the NHS at a secure Hospital in Liverpool. It is 15mins long so I have had to reduce the quality / size so it can be viewed on this page.

The full test went on for 3/4 of an hour. It was carried out by patients and staff from the hospital.

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The mesh is 1.5mm stainless steel powder coated black. The glass (left) in the slider (sash) is 6.4 Laminated, the glass in the fixed (right) is 10mm toughened. This is so they can test the inner and outer glass at the same time. We fit self-cleaning 6.4 Lami to the outside and 10mm toughened inside. The 10mm will take a great deal of punishment without damaging it, but if it does break, it disintegrates into small pieces. The 6.4 laminated glass will break more easily but holds together and will hinder escape. If you have any other glass preferences, we will be able to accommodate you.

The test starts with a kicking attack on the mesh through the open window. Then they try a wooden chair and a brick on the mesh. Next is a scanner (simulating a personal stereo) being thrown at the glass. (The sound of breaking glass is from the scanner not the window).
After this they swing a 3 pin (UK) plug at the glass trying to see if the metal pins have any effect. Then onto a TV/video which has no effect on the 10mm toughened but does crack the 6.4 Lami. The laminated holds together as demonstrated immediately after by attacking it with a snooker cue. A snooker ball is used after this.
A large lounge chair is then pounded against the window until the chair falls apart.
Back to the snooker cue on glass and mesh, then the brick again.

The window passed all tests.

I can call and visit you with more information and answer any questions you may have.
If you require any further information, please do not hesitate to contact me.