Your lack of understanding of private roads. Seriously, go search for 'uk what makes a road private' in your favourite AI search utility. Private roads don't necessarily need to display a 'private' sign, but they ideally should. Under your definition you would be happy to trespass on private land. In the UK, a road is private if it’s not on the highway authority’s list of roads they maintain, or if it’s unadopted. The NSG here states:  USRN: 4600057
ABELS CLOSE, FELTHORPE
Classification: Neither M, A, B or C
Responsibility: Not maintainable at public expense, Private Street Manager, Street State: Open.