Hi @totally , the Bayswater tote would certainly take a 14inch laptop. It’s big and flexible. I have never had anything fall out with the lock closed. Might if you turned it upside down! It has a little pouch that clips to the inside you can keep small valuables in.I've got my eye on the Mulberry Bayswater Tote and had a few questions for those who have owned it for a while!
1) Does it fit a 14-inch laptop?
2) Do you find that your things stay put when the turnlock is closed, or do they still fall out?
Photo from top with turnlock closed and pouch - looks smaller than it is in this photo due to angles.

Hope this helps.