If Dihi, one of the older females in what was 'Kijo's group' is pregnant, they certainly won't be considering introducing a new male at present. So this group is likely to remain without a male for some time to come.
Taun mentioned that the bachelor males at Port Lympne were born at Howletts, which is correct, but most of them were fathered by Bitam, so are not related to Kijo or any of his group. Only 'Kush' & 'Djimu' were born in Kijo's group so wouldn't qualify,while Mataki is also more distantly related also. But when the time comes there are(currently) seven others which they could choose from.
i think the y will get a laid back male introduced to the group in a few years when the dihis baby is abit older but in the mean time they should hurry up and look for one!