The photos quality doesn't make it easy, but I almost surely Lycophidion spp. on the first one and most likely capensis, it doesn't seems to have keeled scales so it cant be Meleya spp.
Only chance to get a better shot of the second one, the shape doesn't look like olive house snake. And the Olive house snake we get up there is Lamprophis olivaceous which is a forest dwelling species. Only few records on the western side of Uganda, (Albertine rift side).