Would Emirates Chauffeur Drive pick up from or drop off at the Isle of Wight to/from LGW/LHR?
Isle of Wight exceeds the 70 mile limit available for CD from LGW and LHR, however I believe you can pay the driver if the distance exceeds 70 miles, that is for drop-off though, not sure about being picked up.
Check the chauffeur thread for contact details if you want to call EK and confirm with them.