That's a bit odd than I think.
DAS Air Kenya (ICAO code DAZ) is a ACMI only company formed by DAS Air Cargo if Uganda as per the aerotransport database which is normally very accurate.
DAS Air Kenya (DAZ) does not operate any aircraft of it's own. If DAS Air Kenya would be doing ACMI work, would they not be operating any of the 5X aircraft? In fact has anybody ever come accross a DAS Air kenya aircraft?
If this doesn't involve DAS Air Cargo, than why would the UK representative mention that they are surprised by the ban.