The Mudlark

In 1875 London, young Wheeler, who lives by scavenging, finds a cameo of Queen Victoria which he thinks so beautiful he risks his life to save it. Possessed of a desire to see the Queen, he slips past the Beefeaters and wanders about Windsor Castle, just when a state dinner is in preparation. Meanwhile, prime minister Disraeli is struggling hard to persuade the Queen to end her long seclusion (imdb)