Presumably the complaint on behalf of the respondent company was made only in respect of the swimming pool because no other interference with the right of way appeared to the company's advisers to be actionable. A question which I think arises in respect of the extent of user of the right of way is whether, having regard to the difficulties of passage due to the physical features of servient tenement a right to deviate onto the land within the servient tenement adjoining the strip of land is implied in the grant and whether by reason of the construction of the swimming pool such a right arose. It is said in A Treatise on The Law of Easements, Goddard, 7th ed., at p. 425: " it may happen, and frequently has happened that a way has become impassable from want of ordinary repair, or it may happen that it is impassable through the act, right or wrong, of the owner of the soil. In all these, and possibly in other cases, an important question is likely to arise whether a person entitled to use the way may pass over the adjoining land, or whether he must keep to the path, however inconvenient it may be, or give up his right altogether if the way is absolutely stopped; and it is clear that these questions may arise, both as to private and as to public ways"; and at p. 429: "If a way is rendered impassable by the act of the grantor, the authorities show that the owner of a right of way would be justified in passing over the adjoining ground, provided it belongs to the grantor of the easement, and provided the act of deviation was a reasonable thing in connection with the user of the right". The construction of the swimming pool is not the act of the grantor of the right of way now in question. It is Mrs. Treweeke's act. The persons entitled under the grant of the right would in my opinion be justified in passing over the ground within the servient tenement that adjoins the swimming pool (cases are cited at the foot of p. 429). In my opinion the absence of any complaint by any person entitled to the enjoyment of the right of way does not in the circumstances raise an equity upon which Mrs. Treweeke can obtain either declaration sought pursuant to s. 89 (3). Each declaration is sought in the face of the existing registered title of the respondent to the easement. As regards the request for an order under s. 89 (1) (b), there is no proof of extinguishment of the right of way by agreement, that is by express release. Mrs. Treweeke's case is that extinguishment was effected by acts and omissions amounting to abandonment of the right of way. "As a general rule a release, whether express or implied, must be made by a party whose estate or interest in the dominant tenement is, as regards duration, either greater than or at least co-extensive with the period for which the easement exists": Halsbury's Laws of England, 3rd ed. vol. 12, p. 562, par. 1222. On the subject of "Duration" this principle is enunciated at p. 530, par. 1151: "An easement may be created by express grant for interests analogous in their duration to an estate in fee simple, an estate for life, an estate for years, or even a smaller interest." It is clear from the express grant of the right of way that its duration is intended to be co-extensive with the duration of the estate in fee simple. The relevant "acts or omissions" would need to be things done or omitted by a dominant owner holding an estate in fee simple in the dominant tenement which would amount to abandonment of the right of way or from which abandonment could be reasonably presumed. "Extinguishment by release may be effected either by express release or by circumstances occurring from which a release must be presumed (Crossley & Sons, Ltd. v. Lightowler [1] ). In all cases of release the competency of the releasing party is of the utmost importance ": Halsbury's Laws of England 3rd ed., vol. 12, p. 563, par. 1221. "The extinguishment of an easement by implied release must be based upon the presumed intention of the dominant owner (Crossley & Sons, Ltd. v. Lightowler [1] ). It is a question of fact whether an act amounts to an abandonment or was intended as such": Halsbury's Laws of England, 3rd ed., vol. 12, p. 564, par. 1226. There is no proof of any act or omission on the part of the respondent which has the character of abandonment in relation to the right of way. The same is true as regards previous dominant owners. Mrs. Treweeke's evidence in her affidavit is tendered presumably to prove lack of use of the right of way by the occupants of the premises on the dominant tenement, which, as already stated, are home units. It is not shown that any occupant was competent to extinguish the right of way by express or implied release. It is said in Gale on Easements, 14th ed. (1972), at p. 317: " as an easement, when once created, is perpetual in its nature, being attached to the inheritance and passing with it, some acquiescence on the part of the absolute owner of the dominant tenement is necessary to give effect to any act of abandonment". There is no evidence of such acquiescence on the part of the respondent. It cannot reasonably be presumed that the intention of any occupant of the home units was to abandon the right of way. Residents of the home units gave evidence that they were informed by the agent of the respondent of the existence of the right of way. The evidence, which the learned judge acted upon to make his finding of some use of part of the right of way, prevents an inference from Mrs. Treweeke's evidence that no person from the home units ever went along any part of the strip of land in respect of which the right of way was granted. Mrs. Treweeke relied upon an incident as evidence of abandonment as to which the learned judge made this finding: "In 1933, following an incident in which an occupant of no. 36 Wolseley Road fell down the steep incline near the boundary between the two allotments and damaged a tree on the applicant's land, a fence was built between the two allotments, although it would appear that probably this fence stands on the respondent's land. This fence was a wire fence, and some of the wire in the fence was replaced in August or September, 1967. Half the cost of the original construction of the fence was paid by the owners for the time being of the respondent's land". Assuming the competency of the occupant to release the right of way, I do not think that it is a reasonable conclusion that the building of the fence amounted to an abandonment of the right of way or was intended as such. The evidence shows that it was not expensive; it is movable; and it is within the dominant tenement. A gate could be inserted in the fence to admit of egress from and access to the servient tenement. The evidence of this incident is not, in my opinion, so cogent that it is reasonable to find that the erection of the fence amounted to a renunciation or disclaimer of the right of way. In any case the last-mentioned finding as to user appears to relate to after 1933.