Oh -- I'm sorry this didn't work out, Els.
I was researching the Tentative Lists to get ideas for African nominations for Top 50 - 2020, and noticed a couple tentative sites still listed on the Kenya page that I think can be removed since they have been inscribed.
The Kenya Lake System in the Great Rift Valley was inscribed in 2011, which I think fulfills
The Great Rift Valley - The Kenya Lakes System site on the T-list (I'm not sure why it still is listed on the UNESCO page as a tentative site).
Additionally, the
Lake Nakuru National Park and
Lake Bogoria National Reserve sites on the T-list appear to be captured in
The Kenya Lake System in the Great Rift Valley WHS, according to the
map from the UNESCO site and the maps of the boundaries of
Lake Nakuru National Park and
Lake Bogoria National Reserve.
Hope you get to visit this site soon -- it looks amazing!