Finally got round to getting the van out. The red neon is not working at all but the socket tester didn't show that there were any problems. Quick questions about how the system works - does the leisure battery supply all the power for the sockets (through an invertor) / sink pump etc. and the electric hook up keep the battery topped up or does the EHU provide the power directly to the sockets? Is there anything I can use to check the charge level of the LB, I have seen a few socket panels that have a display on them but not on my van?