2 bed ground floor apartment with external doors in both bedrooms??

If it was me I'd change the door to window so that you canventelare the room at night and I'd install a wooden or iron gate where the red arrow is. It's not a big deal, ask for site meeting, being a large box if the IKEA biscuits and get on the good side of the foreman

Access to the outside from the bedroom is something I had for a while and hated it. Its always in the back of your mind that someone can just hop a fence and walk in.

I think goingnowhere is correct in the fire safety aspect.

Security would be my main problem too. Would definitely install retractable security screens inside those windows. I'd be nervous sleeping otherwise.

Nobody is going to "walk" in through this door unless it's unlocked! Fairly serious effort required to break in. I personally would have no serious security concerns with the set up. With a gate on the yard you could make a nice indoor/outdoor space imo.

One simple solution is to ensure there is no door furniture on the outside, so no handle, keyhole etc. Dramatically improves security but thats a factory option really

There is clearly a fire safety/accessibility issue here as the normal regs a window which has sufficient opening is sufficient as a method of exit (and entry for someone in full fire fighting gear and tank)

As mentioned above retractable Security grill, along window film on the glass, it will give some daytime privacy but at night time when light is on you can see inside. 

Maybe windows are more secure with triple glazing but I know of several break ins where the patio door was smashed in the corner with a heavy iron bar and it shattered. Most had triple locks and an extra bolt to prevent sliding open when forced. Safety glass so it shatters and allows intruder pass through safely.

That is why I recommend security screens. I presume the doors will also be connected to an alarm.

If you put a locked gate in the area where the red arrows are what exactly is the security concern? There wouldn't be direct access from the outside to your sons room.

You could even cover over that area and it would act like a hall into the house.

You’d want to check your lease before altering your outside spaces. Apartments are different to houses in many respects.

Easier to just walk through the shattered French window and is also a quick exit. I’ve seen it a few times, last in a neighbours house with cameras, lights and alarm, dark evening.

Rural but with close neighbours who responded to alarm almost immediately. Lit up all their own lights in house and grounds. Intruders fled into waiting car. Had gathered a few items by window but left empty handed due to quick response.

Window replaced and security screen added.

mine leads out on to the back car park so it’s handy in a lot of ways I can park at the back or front. I have Venetian blinds so feel they stop people being able to see in without going right up to the glass. I also have a ring security camera for my own peace of mind but it’s just become normal for me and I don’t really see any disadvantages only that it’s hard to get suitable curtains and it looks a little unusual but I don’t have an extra security fears