BAN Foreign nationals / non residents from buying up domestic properties.

The British people / foreign residents should have the priority to buy affordable / domestic properties.
To be able to comply with this project, we must ban foreign nationals / non residents from buying up domestic properties. We need an END on this property BUBBLE.

Petitions need to call on the Government or Parliament to take a specific action.

We're not clear who you mean by "foreign nationals / non residents" and by "foreign residents". We also aren't clear whether you want an absolute ban or a priority system.

You could start a new petition explaining clearly what you would like the Government or Parliament to do.