Pleasant melody begins with tubes and a variety of violins and continues with a dozen of instruments. It is played by the whole orchestra, which gives the impression of lightness and inspiration from all that is happening on the screen. Since it is the opening theme of the film, it turned out exactly the way its creators wanted it to be, namely cute, fun and addicting. The duration of this classic-genre melody is just 1:44.
Reference: Paddington OST: Amazon.co.uk