text: Seems a little bit unlikely. This is a formal Public Right of Way, path number 25LR designated by West Sussex County Council. The currently available Shape File of rights of way includes this route, and a reasonably diligent search on the council website does not show any notices of closure (temporary or otherwise) or extinguishment. The process of removing such a right of way is legally quite complex, and as this one is part of a long-distance walking route (Ouse Valley Way) likely to excite a degree of local protest. I find no hits with "footpath closure Haywards Heath Golf Course" either.
  
  It is not unknown for landowners to take measures to impede people's legel rights of access to PRoWs. It appears that this golf club has form in this regard. http://www.walkingclub.org.uk/book_3/walk_198/index.shtml.