Any advice on this gratefully appreciated. We bought a house in 2002 and there was a grass area outside our fence which we were told was ours. We maintained it as had previous owners. In 2011 we moved fence out to enclose this area in our garden. It fell next to a pavement and not next to any other gardens. We asked all neighbours as a matter of courtesy were they happy for us to do this and they all were. We genuinely believed the land was ours. 2015 house behind sold as neighbour passed away. New neighbour raised boundary issue prior to purchasing house as he claimed part of this land was his. Checked land registry and some of it is his. Explained situation to him and how effectively we had done this in good faith and actually the land in question is not actually adjacent to his house plot (only adjacent to his second driveway which was split) so he couldn't really do much to it anyway. However he said he either wanted it back or we could buy it off him. He wanted £10k. The land is not worth this. We exchanged correspondence but nothing further was done. 2 years later we put house on market and lo and behold he raises it again. We declared it to estate agent and at the time he had appointed a solicitor so we wrote back to solicitor and heard nothing further. In the last year he has wind of fact house is going on market and we get another letter. We respond nothing further heard. However the house is going on the market and I need to sort out boundary issue. Can anyone advise if I can claim adverse possession or proprietary by estoppel. I really don't want to spend £1000's on legal fees. Worse case scenario is that we move fence and wall in. However, it will change our garden and we put a lovely stone feature down which will have to be removed. I genuinely feel he is trying to extort money from us. He bought house behind knowing where fence was. Any advice gratefully appreciated.