To preserve and to renovate reconstruct and operate for the benefit of the people of the county of norfolk and of the nation at large, whatever of the historical, architectural and constructional heritage that may exist of the permanent way, track, buildings (including any building as defined in section 336(1) of the town and country planning act 1990), bridges, operating equipment and rolling stock once forming part of or connected with or adjacent to the great eastern railway line running between county school at north elmham in the county of norfolk and wymondham in the county of norfolk