"I turn now to the question raised by par (c) of s 89(1), namely whether the proposed modification will substantially injure persons owning (or having an interest in) other lots in the subdivision ... in this context "substantially" connotes injury which has substance in the sense of being real or appreciable. The kind of injury contemplated in par (c) is injury to the relevant person in relation to his ownership of (or interest in) the land benefited. The injury may be of an economic kind, for example, reduction in the value of the land benefited, or of a physical kind, for example, subjection to noise or traffic, or of an intangible kind, for example, impairment of views, intrusion upon privacy, unsightliness, or alteration to the character or ambience of the neighbourhood. These arbitrary categories, whilst serving to illustrate the ambit of the concept of injury for the purposes of the paragraph, are neither mutually exclusive nor necessarily exhaustive and what I have described as injuries of a physical or intangible kind could well also affect the value of the land in question. However, it is clear that a person may be "substantially injured" within the meaning of par (c) notwithstanding that the value of his land would be unaffected or even increased by the proposed modification. It is also clear, particularly in the case of injuries of what I have called an intangible kind, that the subjective tastes, preferences or beliefs of particular individuals may, within limits of reasonableness, give rise to injury in the relevant sense to those individuals. ..."