copy bars with time signagture changes

I have a score which has frequent time signature changes. Some of the music repeats, so I want to copy and paste the notes, including the time signature changes.

When I do this, the notes are copied ok as usual, but the time signatures are not copied, which means the copied bars with new time signatures are wrong

I cannot find how to do a copy/paste that includes the time signatures - is this possible please?

A short score showing the problem is attached

Tim Kendal