There are a variety of basins on the market. When a basin leaks it has a few places where we need to check;
The P/ S trap or stainless steel trap is leaking.We will need to change the leaking item.
The basin waste is leaking. We will change the waste.
Flexible hose connector to the mixer or tap is leaking.
The tap is not sealing properly on the basin. The spilt water then goes through the unsealed tap and drips onto the floor. We need to take the tap/mixer off and re-seal it.
Basin is cracked somewhere. We must replace the basin.
Angle valve/ shut off valve is leaking. This will need to be replaced. Sometimes the angle valve/ shut off valve breaks in the wall and a few tiles must be chiseled out.