Weird tap started dripping

[SteveH2]

This tap is dripping through the spout, just a bit
see photos, robf shows when closed, robo shows when open and rob3 shows a side view
I don't think it can be the washer. We've given it a good vinegar soaking and scrubbimg.
Any ideas please
Can anyone identify the type or the maker. It's getting on for 20 years old
Thanks

 

[Deleted member 120897]

Requires a new tap cartridge, no idea on make, but you could take to a local merchant who deals with tap cartridges