Davies v Hertfordshire CC [2018] WLR(D) 1411, is not a Traveller case but is a useful reminder that, even where there is no security of tenure, a public law defence can be put forward to a possession action (in this case concerning Children Act 2004 section 11).

See the transcript at: http://www.bailii.org/cgi-bin/format.cgi?doc=/ew/cases/EWCA/Civ/2018/379.html&query=(davies)+AND+(v)+AND+(hertfordshire)