1+ Spoiler panel  
2+ Turn fastener  
3+ Lokut nut  
4+ Self tapping screw  
5+ Retaining bracket  
6+ Oval washer  
8+ Blanking grille  
9+ Undertray  
10+ Nut  
11+ Plain washer  
12+ Screw  
13+ Clip  
14+ Countersunk self tapping screw  

The part numbers in the assembly image below relate to the product number in the table. Clicking on the part number will open up the relevant part details.