A spokeswoman for KC said the agreement was "definitely not" a deal to provide the west Yorkshire company with wholesale line rental rates.
Ok question who will you pay line rental to

KCom or Nexus
If Kcom then retail volume deal, if nexus the CDR will be passed from Kcom to Nexus and Nexus will bill the customer.
That means that Nexus will be responsible for fraud on the service and as such this becomes a wholesale deal as the risk on the provision resides with the customers operator (Nexus)
Oh dear Kcom you should read you Ofcom guidelines !!!!!!