Oli, Jonathan, Dave:
The DARM FOM in the control room (running on nuc30) stopped updating and could not be restarted. Jonathan tracked it down to an ongoing NDS2 issue which will hopefully be resolved soon. In the meantime I started the "local" version of this fom which only uses the local NDS and does not try to connect to NDS2.
I'm running the diaggui by hand from a terminal as controls on nuc30, it was started with:
cd /opt/rtcds/userapps/release/cds/h1/scripts/fom_startup/nuc30
diaggui --fom ./H1_DARM_FOM_cds.xml