GOD
your windows look identical to ours.
We also had a pair of narrow Crittall French doors replaced with a single aluminium door.
It has a wider central vertical bar to look like the original doors
It has no form or retaining stay (s) and that is a drawback to the design.
It seems the norm to internally fit wide flat plasic strips to hide the damage caused when the old frames are removed. I opted to leave the damage on view and for me to fill in the gaps and redecorate thus eventually having and original fit appearance.
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