Chosen Solution

Need help to stop the leak coming from here. Not sure how to open it up and use what washers. Is it possible to open it without a adjustable wrench

Hi, My eyes aren’t that good anymore but looking at a close up of the 2nd image are these grub screws that may be undone with an allen key (or hex key) or are they something else?

(click on image to enlarge or better viewing) Usually spouts have an o-ring to prevent the water getting past. Is there a brand name anywhere on the tap?