The HR must be pretty miniscule, if at all there
Your post states that the engineer who has already visited said there was another "
Possible HR". This could indicate that the TDR function we use to identify HR's, has actually shown a cable joint where the poundage (size) of the two cables changes from, for example, 0.4 Ali to 0.5 Cu ??
Of course I've no idea what the engineer on-site has seen, so have to trust in his experience.