In article ,
Tim+ wrote:
https://photos.app.goo.gl/Rt6Ju7hN7rkF8ip29

Is it possible in this door?

I'm wondering about a reduced length window in the centre section
and if possible, a new crosspiece to enable secure glazing and
place to put a cat flap. Is this possible post-manufacture?

I'd say the easy way would be to replace that glass panel with something
equally as strong - say plywood of the same thickness as the glass.
Perhaps Formica covered to give a nice smooth surface.

--
*Don't worry; it only seems kinky the first time.*

Dave Plowman London SW
To e-mail, change noise into sound.