window Upvc window handle issue

[Eddyman]

So I have come across this handle as you can see in the picture that needs replacement. Which is fine I have replaced many of them in the couple of years but I have never come across one like this. The base plate can't be turned to assess the screws because it was installed against the window beading. So my question is did anyone has ever replaced a handle in the same situation and how did you do it?

 

Thank you 

[Tennentslager]

Where in the world is this?

Any manufacturers marks anywhere to be seen?

[Eddyman]

This in in London Canary Wharf and no manufacturers marks to be seen. And I can't even see under the window frame because the window open towards outside .

[Iceverge]

1 hour ago, Eddyman said:

This in in London Canary Wharf and no manufacturers marks to be seen. And I can't even see under the window frame because the window open towards outside .

 

Carefully ( maybe attaching it with string to your wrist in case it drops)  use your phone camera to make a video of the part you can't see. You might get a manafacturers mark then.