Can we extend the Castleman Trailway from here to the east, following the alignment of the old railway to Barrack Lane (where route 256 / the trailway ends)?

Source that the trailway continues: https://www.dorsetcouncil.gov.uk/documents/35024/283293/Castleman+Trailway+leaflet+25+april+2018.pdf/64f6d89f-505f-e70e-8ad2-3a7360f9a76d