It's advisable to create a category, so that your residential UK stock is separated from the overseas ones.

Adding Category:

Control Panel > Properties > Manage Categories > Add category

Then enter a name and description for this category also select the category group.

To filter out Overseas from Residential properties, a "View/Preset" must be created.

Manage Presets:

Go to control panel > properties > manage view presets > create new view preset > enter the name of this new preset and choose the category that you creates so that only "Overseas" properties are shown.