In Stocznia Gdanska SA v Latvian Shipping Co and others  2 Lloyd’s Reports 436, per Rix LJ at para :
The silence was not mere silence, it was overlaid with all that had gone before. It was a speaking silence. The difficulty with silence is that it is normally equivocal. Where, however, it is part of a course of consistent conduct it may be a silence which not only speaks but does so unequivocally. Where silence speaks, there may be a duty on the silent party in turn to speak to rectify the significance of his silence.