Lockdown Learning - The correct use of a voltage indicating device 

yep, you turn the switch to the boiler off, and you probably use a voltstick if at all after, I've doing this for decades and have never meet anyone that's had a problem, however if you have the kit handy just use it.

It is possible when using a multimeter that the operator could set it to measure something other than voltage, human error, and therefore would not detect the presence of a dangerous voltage. Whereas, an Approved Voltage Indicator can only be used for checking for Voltage.

@@jocelynne2552 I see the logic in that With all the gear for these test I'm going to need 2 trips to my van