Kitchen sink leak

[Essex_DIYer]

Hi all,
Noticed a leak that comes from the side drainage, not the main part of the sink.

Hopefully pictures make it clear.
Is this a fix I can do myself, e.g. with sealant? Or will this need new parts/plumber intervention?

Thanks as always for your help.
Martin.

 

[Deleted member 120897]

Possibly wants tightening, of it’s a failed washer - should be easy enough, just make sure you get the correct size, and shape.

 

[rpm]

Possibly wants tightening, of it’s a failed washer - should be easy enough, just make sure you get the correct size, and shape.

Tightening washer where, photo 1 or 2?

 

[Basher]

The sump and elbow are all one moulding, so assuming that's not damaged, the leak is probably because it's not sealed to the underside of the stainless draining board properly.
If it were me I'd take it off, clean it up, check it out for any cracks and check the condition of the sealing washer, if any, and probably use some silicone between it and the draining board when putting it back

 

[Deleted member 120897]

Tightening washer where, photo 1 or 2?

Tighten the screw, pulling on the washer underneath, so photos 1 and 2.