A First World War Town cruiser at the Falklands landing

What would happen if a surviving First World War Town-class cruiser intervened at York Bay in April 1982?

At close range it could inflict serious damage on the landing before Argentine forces sank it.

The scenario places an unexpectedly surviving Town-class cruiser inside York Bay while the Argentine landing is underway. Its effect depends on reaching that position without being intercepted. Close-range gunfire could cause substantial damage among the landing forces. Survival is judged unlikely once Argentine forces respond, so this is a disruptive local intervention with no assured lasting effect on the campaign.