"I have made the decision after a great deal of thought and consultation with my family. As I made clear at the weekend, I accept that I have made comments on social networking sites which have offended many people. I am really sorry for any offence caused.
"I strongly reiterate that I am not racist or homophobic. I have fallen into the trap of behaving with bravado on social networking sites. I hope that this this may stand as a learning experience for many other young people.
"I would like to thank those people who have sent messages of support and understanding. I wish the Commissioner, Kent Police and the person eventually appointed to this role every success".
More top news
Team SCA, which includes two sailors from Hampshire, has passed Cape Horn in the Volvo Ocean Race. They paid tribute to their late coach.
Delays are expected around the region over the Easter break. Rail engineering works mean that some services are suspended.
Thursday mornings weather for the east of the region