just moving into a new build. All window handles have locks with keys apart from two. One of them is my little boys room. Is it just a matter of swapping his handle for one of the lockable handles downstairs. How do they come out?
Should be able to swap them. Most handles have a square spindle, bit there are other variations flat bar, but removal is the same. Prise off plastic cap, you will find a screw,when you turn handle to open window, you see the second screw, just need to remove both of the & handle will slide off, the spindle will is usually fixed to the handle. (known as Espag Window Handles)
Could alway get a Emergency escape hammer to break the glass, my friend use to have one stuck to the inside of the window reveal in her kid's bedroom, due to having lock fitted.