A gentle pootle out this morning in Troy quarry, Left Siamese Twin has a loose block just before the main break around 2/3rds up. It is approximately 2ft x 1.5ft x 2ins deep.... I am sure someone will be along to tell me it has been like that for 20years but I have never noticed it before and the crack is the total of its circumference. Could do serious damage to a belayer. Anyone else noticed this??