UK Foreign & Commonwealth Office now advise against travelling unless essential..
http://www.fco.gov.uk/servlet/Front?...=1013618386082
"We advise against all but essential travel to Kenya. There is uncertainty about the security and political situation in the country linked to the disputed presidential election result. On 3 January there were outbreaks of violence around Nairobi between groups of demonstrators and security forces. If you are in Nairobi you should remain indoors. See the Local Travel section of this advice for more details.