First, he tried to build a wall at his golf resort in Doonbeg, Co Clare. And failed. Now former US President Donald Trump is facing a High Court battle about a fence by the sand dunes at the five-star getaway. Environmental activist group Friends of the Irish Environment is challenging the Trump-owned TIGL Ireland Enterprises about the allegedly unauthorised erection of defences around the golf links at White Strand, Doughmore. The group claims the development, intended to limit coastal erosion, will result in profound and irreversible environmental damage to a protected habitat. “What we’re saying is that the erection of…