Former Government chief whip Andrew Mitchell has said he is "bitterly disappointed" to have lost his High Court libel action over the "Plebgate" incident.
Speaking outside the High Court, Mr Mitchell said the verdict came after a "miserable two years".
The MP, who has been ordered to pay interim costs of £300,000, said he now wanted to "bring this matter to a close and and get on with our lives".
After the ruling PC Toby Rowland said he hoped a "line can be drawn and everyone can be left in peace".
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William and Kate will visit the country between October 14 and 18.
The teenager was killed when his motorbike crashed into a car allegedly driven by an American diplomat’s wife.
The alleged incident took place on Saturday afternoon.