Thanks for the suggestion.

I did have a brief look at Sensu and whilst being very impressed, it seems to be quite extensive, and when I deliver the tool and setup/administration procedure one of the requirements is that this can be maintained going forward by any member of the team. We have a few juniors and with Sensu, this wouldn't be the case.

I'd forever be pulled in to 'sort it out', I can already hear my phone ringing!