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Aero has very little left in the rotary division. The previous Head of Flight Operations, Patrick Agbonlahor is now deputy Director of Flight Operations for Caverton. I'm not sure if their AW139 is still flying for Total as the last time it went AOG it was on ground for more than 2 months. They still have an old Dauphin at Port Harcourt and their S76C+ scarcely ever flies. They do still have the contract to operate and maintain the 3 NNPC EC135s.
As far as I know CHC has not yet started to operate though they do have a base on Snake Island with their new partner, Atlantic Aviation (which is also part of Niger Dock) and their AW139 seems to be there and they also have at least one (old) S76C+ in country. Rumour has it that they're bringing in at least 1 more S76C+ and up to 5 more AW139s in the next 3 months.