buildersmate has not received a proper education and has had no training and experience in any matter connected with the construction industry and is ignorant of the Party Wall Act. The whole Act must be read together, it is criminal and dangerous to take partial sections out of context and pervert them and to pass off the perverted sections as fact to the unknowing as buildersmate has done.
The sections referred to deal with matters related to a Party Wall only, nothing else. It is an easy read even for the layman, and if you go to
this link you can read the Act and the sections perverted by buildersmate and see how in actual fact it all fits together.
The answer to Schnikki's question is an unequivocal no. If the owner of adjoining land will not give permission for access to assist in the construction of a new house or an extension then that is his unassailable right and is an end to the matter.