Hi guys. On my way back from work and got a rattle from the front. Had a look when I got home and without taking the wheel off I can feel the heat shield on the back of the caliper is loose. I guest it might be rotted off but just wondering if anyone knew what the most likely cause could be before I have another look tomorrow. Thanks in advance. 

50/50 shield has rotted at the mounting tabs/pop rivets have rotted.

The rivets are pretty big at 6mm and most rivet guns won't take them. I've seem a nut and bolt used instead but it's not good practice.

The shields are available pretty cheap.

Once they're loose the movement will fatigue the other tabs quite quickly so it's worth sorting.

Cheers for the reply. I'll take a look tomorrow.