In 2007, Cragside reopened after undergoing an 18-month refurbishment programme that included rewiring the whole house. It has become one of the most-visited sites in North East England, with some 255,005 visitors in 2019. The Trust continues restoration work, allowing more of the house to be displayed: Armstrong's electrical room, in which he conducted experiments on electrical charges towards the end of his life, was re-opened in 2016. The experiments had led to the publication in 1897 of Armstrong's last work, "Electrical Movement in Air and Water", illustrated with remarkable early photographs by his friend John Worsnop.