Andrew Gabriel wrote:
The employer is responsible for ensuring they provide a safe
workplace for their employees. ...
They have stickers - however the person who did the testing has not been on
a PAT testing course - is this a requirement?
They should be competent to do the testing or they might as well
not be doing it.

Moreover, as PAT testers use high voltages and the task of testing
necessarily involves working with equipment which is not yet known to be
safe, having someone who has not been trained in how use a tester and
how to inspect equipment before testing is itself an unsafe system of work.

Owain