Can I bind a property that will update custom ViewCell renderer for iOS?

I have a simple ListView where I have populated the ItemsSource and ItemTemplate. The custom renderer needs to be run to set iOS specific cell properties on a button click, for example, but I cannot see any way of doing that.
Basically I want a tick list of cells, in iOS the renderer sets the cells Accessory to UITableViewCellAccessory.Checkmark for the currently ticked cell, but I need to be able to update the cell when the model value for this changes.

Thanks
John