You can complete this series by train by catching the St Ives branch line from St Erth station and getting off at Lelant (NOT LELANT SALTINGS)
When you have completed the series you can catch a train from Penzance back on the main line to london.
The historical significance of St Michael's Way lies in the fact that it is part of a network of pilgrim routes that lead to St James' Cathedral in Santiago de Compostela in northern Spain, one of the three most important sites of Christian pilgrimage in the world. The route, which dates back to pre-historic times (10000 BC to 410 AD), is thought to have been used by pilgrims and missionaries who arrived from Ireland or Wales and chose to abandon their ships and walk across the peninsula from Lelant to Marazion, rather than navigating the treacherous waters around Land's End. These early missionaries, who are now commemorated as saints in place names throughout the county, are thought to have been instrumental in Cornwall's rapid conversion to the Christian faith.