I have been called to new installations (which were tested
and certified).which have had some sockets incorrectly wired.
The cabling was correct from the consumer unit but possibly the apprentice was left to make final connections to socket terminals and managed to get live and neutral mixed up
Quick check is to turn power off open up socket and visually check terminal labeling and colour of cables.
And if you have a multimeter, switch power back on to actually check the cables for voltage for and polarity.
L to E = 230v
L to N - 230v
N to E - 0v ( but could go upto 30v ish still ok)
Also recently went to a house where the original lights cabling was red (live) and black (neutral) and extra lights were added BUT with new brown (neutral) and blue( live) cabling..
An innocent mistake or didn/t check polarity after connection either way lights will work but not safe.