hi, i presume u are referring to the Aug 07 mature estate (4-room & bigger) balloting exercise. from what i understand, the block used to be rental flats to workers from a construction company. they moved out after their contract ended or smthg like that. u will see corner units available in the Aug 07 balloting cos these are the 4 room units. the corridor units are 3 room flats which had been released a couple of mths back in the monthly 3-room balloting exercise