In 1897 he was made an Honorary Knight Grand Cross of the British Order of St Michael and St George, and later that year was appointed Envoy Extraordinary and Minister Plenipotentiary to the Court of St James's. Soveral was a friend of the Prince of Wales (later Edward VII) and a prominent member of the "Marlborough House set", the group of aristocratic and other friends of Edward when Prince of Wales who were regarded as leading fashionable society, at a time when the royal court of Queen Victoria was sober and domestic in tone. He was Ambassador Extraordinary for Edward VII's coronation and was made an Honorary Grand Cross of the Royal Victorian Order in 1902. He was Ambassador Extraordinary to the Second Hague Conference in 1907. His tenure as Portuguese Minister in London ended in 1910, when the Revolution of 5 October overthrew the Portuguese monarchy.