Bear in mind that any kind of visa application to UK will have to mention the children, and the fact that there ARE dependent children, and their circumstances may affect the outcome of the application.

Removing the children away from (you hope) the reach of the father is not going to stop him wanting access either, or affect that right. Why should it ?

He will still need to be consulted when settlement visas are applied for, as his name is on their birth certificates.

Has anyone considered the feelings of the children in all this, now or in the future ?