I have allowed a neighbour to cross my land with horses in the last few years , however I am concerned that as time goes by this may allow him to establish a right of way, i am concerned that if i decide in the future that i do not want them crossing that he could claim he has established a right of way, also what are the restrictions with regard to right of way, i have no problem with access by foot or horses, however i would have with cars or heavy machinery