BT Group and Ericsson are the actors in this event. BT says the two companies renewed and expanded their core network partnership on 2 March 2026, building on Ericsson's dual-mode 5G Core deployment on BT's Network Cloud. The new functions are technical but strategically important: they decide how BT can package reliability, latency and network capabilities for UK businesses.
The control surface is BT's 5G Standalone core. Network Slice Selection Function gives BT a way to choose and adjust slices by time, location, subscription type, load and application requirement. That matters when enterprise customers want mission-critical services to behave differently from ordinary mobile traffic. Healthcare, logistics and industrial operations are the obvious test cases because they need predictable performance when the network is busy.
Network Exposure Function changes the commercial question. It lets customers, developers and partners integrate selected network capabilities through secure, standardised APIs. BT frames this as a shift from connectivity layer to programmable platform, with possible quality-of-service controls and device authentication. Ericsson's role is to supply the 5G Core and analytics layer that makes those capabilities visible and manageable.
The signal is not that BT and Ericsson issued another partnership announcement. It is that the UK 5G business case is moving from coverage and capacity toward controllable service classes. The proof will be whether BT can turn slicing and APIs into priced, repeatable enterprise products without making integration too complex for customers or developers.