The following accessories are all available for the EcoSport in India so I'm hoping at least some of them will be available in the UK as well; (The images are courtesy of ZigWheels)
Wind protectors
Wheel Cover
Scuff Plates
Running Boards
Roof Rails
Roof Rack
Reversing Camera
Rear Spoiler:
Rear parking Sensors:
Boot cover:
Rear bumper guard:
Pedal Covers:
Headlight protectors:
Fridge:
Car Cover:
Wind protectors

Wheel Cover

Scuff Plates

Running Boards

Roof Rails

Roof Rack

Reversing Camera

Rear Spoiler:

Rear parking Sensors:

Boot cover:

Rear bumper guard:

Pedal Covers:

Headlight protectors:

Fridge:

Car Cover:
