Why was William Thomson raised to the peerage as Baron Kelvin?

William Thomson was raised to the peerage as Baron Kelvin in recognition of his profound contributions to the fields of engineering and physics.1

His elevation followed a distinguished career in which he helped lay the foundations of modern physics, including his work on the second law of thermodynamics, the absolute temperature scale, and the mathematical analysis of electricity and magnetism. Additionally, his theoretical research and practical inventions for submarine telegraphy were instrumental in helping Britain achieve a preeminent position in global communication during the 19th century. Prior to being raised to the peerage, he had already been knighted in 1866 for his work on the transatlantic cable.12