Mo Farah, Britain's most successful distance runner, is set to compete at the London Marathon next year.
The four-time Olympic gold medalist over 5,000m and 10,000m is coming to the end of his first full year as a dedicated marathon runner, which saw him set a European record of 2:05:11 at the Chicago Marathon in October.
That result was an improvement on the 2:06:21 he had run in London six months previously -- at the time a British record.
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