Thanks for the responses.
In response to your question, Arnie, I didn’t do the AE stuff on this project. I’m just coming on at the end to finish it off and send it out. But I think the reason was that the graphics are designed with an animated intro and outro, but still in the middle. Instead of making a new movie file for each graphic, they’ve just done one with no text elements which we can lay down and adjust to size, the type over the top. The previous editor on the project just used a freeze frame prolong the pause before it animates out, which in fairness I probably would have done too.
I’ve now extended the pause by just repeating the still section of the clip so it can be reconnected later if it needs another change. Next time I’d just suggest to make the pause in the middle impractically long so you can cut it down to size.
Cheers everyone