I can see how you are keen to get tourists back as it's your livelihood that's feeling the pinch, but I think it will take a while for the current peace to bed down, and therefore a while before our governments further relax the warnings on visiting. The UK government currently advises:
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# A number of areas of Kenya are experiencing violent unrest following the disputed presidential election result and may be prone to further outbreaks. The security and political situation in the country remains unpredictable. You should avoid all public gatherings and large public meetings. Any rallies, even if advertised as peaceful, could potentially turn violent. See the Local Travel (Election related concerns) section of this advice for more details.
# If you are currently in Kenya you should exercise extreme caution and seek advice locally either from your tour operator or the local authorities, particularly if you need to travel. We are working closely with the Kenyan authorities and the British High Commission emergency lines are open. The emergency numbers are 00 254 20 2844 660/661/662/663/664/665/666.
# We advise against all but essential travel to: Western and Nyanza Provinces; and the following districts of Rift Valley province – Nakuru (including Naivasha, Lake Nakuru and Lake Naivasha National Parks), Turkana Central, West Pokot, Trans Nzoia, Uasin Gichu, Koibatek, Nandi, Kericho and Bomet.
# We also advise against all but essential travel to the worst-affected areas of Nairobi, including all township or slum areas, which are experiencing constant tension and periodic, unpredictable violent unrest. The worst incidents have been seen in Kibera, Mathare, Huruma, Kariobangi, Kawangware, and Eastleigh. If you are in these areas you should remain indoors, exercise extreme caution and seek advice locally if you need to travel. There have also been incidents in the city centre, especially in and around Uhuru Park.