2 way switch issues

2 way switch issues

2 way switch issues

Hi guys do my tenants moved out the other day but I noticed the staircase lights ain't working, so I took a pic of the switch in not sure if the old tenant has tampered with the switch, I've tried calling him but he won't answer. Can anyone please tell me if this switch has been wired correctly? I've tried changing the light bulbs and still not working.

Thanks guys

by everlastuk

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