Update on 19.07.2019: Thanks for the fix! The link appears to be working again and I was able to successfully download the summit list csv file.
Original post: The link (http://www.sotadata.org.uk/summitslist.csv) to the summits list csv file appears to be broken at the moment. This link is typically found at the botom of of the page http://www.sotadata.org.uk/summits.aspx.
Thanks for any help.