Hi everyone, long time listener, first time caller here. 

We're currently looking at bringing our legionnaires compliance in-house so I am exploring the necessary training for our technicians to do this. I'm running up against the usual 'appropriate training and expertise' in the HSE guidance and when looking at the available training there's quite a wide variety of training on offer so I'd be interested to hear other people's thoughts/experience on the level of training required. 

Our risk assessment/sample testing is contracted out to a specialist, as are things like tank cleaning and calorifier inspection so the main tasks for our technicians will be flushing of LUOs and temperature monitoring. Realistically both of these tasks are relatively simple but I would like to have training of some kind in place to demonstrate that the technicians are competent. When looking at the options on offer, the options seem to be a basic legionnaires awareness course which covers the risks etc but doesn't go into detail on how to actually complete the monitoring tasks or the City & Guilds course which covers this but is about £300 per person and seems overkill for our situation. My current thinking is that if I do a responsible persons course and put the technicians through an awareness course plus some in-house training on how to complete each task, this would be adequate for our purposes but I would be interested to hear what others have done at their organisations. We may also end up just using a different service provider to complete these for us but would like to consider all options. 

For reference, it's a fairly simple gravity fed system with no recirculation. Taps are fed from a rooftop header tank with POU water heaters. We don't have any showers or TMVs.