OrangeHurst97
This is an official footpath according to OS maps and the West Sussex County Council website. There are no issues with trespassing as long as the walker stays to the line of the path. See the following webpage to see this track: https://www.westsussex.gov.uk/land-waste-and-housing/public-paths-and-the-countryside/public-rights-of-way/public-rights-of-way-imap/imap/