Well after hearing everybody say there centre caps go missing on the fiesta ST made me think what can be done? Other's silicone them in or glue and put there car number plates and names on the back but people can still take them, Just a screw drilled though would stop them i think, well for a while anyway.

Just a simple screwdriver could remove it but theft's normally dont carry a set of screwdrivers (well a flat headed one) I could put say a allen key sort in.

It would be in between the nuts here.