Owned by Vantage Towers, UK-focused Cornerstone provides tower and site management services used by MNOs. With 16,000 sites in its portfolio (the largest in the UK) this infrastructure footprint is being tapped up by startup StonesThro – looking to build its Micro-Edge platform in this MNO-adjacent portfolio. The goal is to provide distributed edge computing. For Cornerstone, this is not far removed from another site rental agreement. For StonesThro, that footprint is a way to undercut the hyperscalers as they attempt to expand outwards to the edge. Still, this is an uphill battle. Ashley Sellar, CEO of StonesThro, and also the interim CRO at Cornerstone (on a contract basis), outlined the imminent commercial launch, ahead of MWC. “StonesThro is under…