It's a CO2 'revolver' with pellets loaded into the tips of plastic carrier 'bullets' so I think the accuracy potential is limited. You should be able to whack soft drinks cans all day long at 10 yards, but chopping match-sticks at the same range is not going to happen.
'Very accurate' too me would be the ability to group into 10mm at 10 meters, which is what you would expect from an old school Match pistol like a FWB 65 or similar recoilless type. 'Accurate' for a sporting pistol would be a group size of about 20mm. 'Plinking accurate' would be 30mm or so, and the Webley fits into my last category. It is sufficiently accurate for what it is designed for, plinking.