There is a hole through the middle of my bread! Help please.

I have been making Annabel Langbein's busy peoples bread recipe for a couple of months. It has been trial and error however I seemed to get the texture just right but my last 2 loaves have had a hole through the middle. Can some please tell me what I am doing wrong. I have changed to a deeper bread tin so I'm not sure if that could be a reason.Thanksfrom Sue from New Zealand

Feedback please. Can the sourdough mystics of the sub tell me how I can improve my loaf just by looking at it? (More details re. recipe and process in post.) : r/Sourdough

How to Fix Flat Sourdough Bread and More Bread Baking Tips

Reasons for Dense Dough – The Baking Network

Wauseon Indians Music Boosters

why is there a hole in the middle of my bread? : r/Breadit

A Surprising Secret for Making Better Bread with a Bread Machine

6 Rules for a Perfect Grilled Cheese, Every Time

why is there a hole in the middle of my bread? : r/Breadit

Didn't punch down my bread dough. Made the best of it. : r/shittyfoodporn