UPVC window handle stopped working

[Doc_Brown]

Hi all. I have a handle on a UPVC window that's refusing to budge. It was working fine until recently - we open it once or twice every day - then suddenly refused to move. I can depress the button, but no matter how hard I try, I cannot force the handle to turn. There is half a key stuck in the lock, but that's been there for years.

Any ideas or advice would be gratefully received.

 

[crank39]

The push button has failed which is very common on that make of handle, not repairable so need to replace the handle

Rh cranked espag handle

https://ebay.us/m/yTtaxZ

 

[opps]

The push button has failed which is very common on that make of handle, not repairable so need to replace the handle

Rh cranked espag handle

https://ebay.us/m/yTtaxZ

Out of interest- How do you get to the lower screw if the handle will not turn?