  We present the results of our long term radio monitoring campaign at 1.3GHz
(MeerKAT) and 15.5GHz (Arcminute Microkelvin Imager - Large Array, AMI-LA) for
the outburst of the recently discovered neutron star X-ray binary Swift
J1858.6-0814. Throughout the outburst, we observe radio emission consistent
with a quasi-persistent, self-absorbed jet. In addition, we see two flares at
MJD 58427 and 58530. The second flare allows us to place constraints on the
magnetic field and minimum energy of the jet at 0.2G and 5x10^37erg,
respectively. We use the multi-frequency radio data in conjunction with data
from Swift-BAT to place Swift J1858.6-0814 on the radio/X-ray correlation. We
find that the quasi-simultaneous radio and BAT data makes Swift J1858.6-0814
appears to bridge the gap in the radio/X-ray plane between atoll and Z sources.
Furthermore, AMI-LA observations made whilst Swift J1858.6-0814 was in the soft
state have allowed us to show that the radio emission during the soft state is
quenched by at least a factor of four.

High Energy Astrophysical Phenomena