Thank you all for your thoughts. In a brief (perhaps covid-feverish!) moment I did think that the surname was Melba and then I went down a whole flight of fancy that Nellie Melba also travelled as Lena Melba..........
But I am back in reality today!
The guestbook dates between 1910 and 1916 - the majority of signatures are in the early part of that bracket. The family had connections in Shropshire, Herefordshire and Wiltshire but also were fortunate enough to have the money and connections to travel abroad too.