The BBC News article Antarctic: No role for climate in Halley iceberg splitting says:
With no-one on the ice surface, notice of any breakaway will have to come from automated in-situ instrumentation and from spacecraft observations.
What (if any) "in-situ instrumentation" is on the Brunt Ice Shelf that will detect its splitting and breaking away?
This answer to my question The giant 6,000 km2 iceberg A-68; will ground-truth telemetry supplement satellite tracking data? suggests that there was no GPS tracking of iceberg A-68 (which still surprises me!) but does the Brunt Ice Shelf have GPS and automatic telemetry?
Note: The BBC article contains the following possibly helpful links:
This remote-sensing data is processed by the ENVEO (Environmental Earth Observation) company, in Innsbruck, Austria; and ENVEO staff are co-authors on a new paper with the Northumbria team that is under review in The Cryosphere journal.
Source: NASA, LandSat, USGS, BBC