Yes Bluebelle, the crowd scenes on Gorleston Beach is where the local school children were used. It looked a fun day, wish I'd been there, such a beautiful beach. The band were playing on the balcony/roof of the Pier Hotel, and the aerial shots of the really huge crowd were amazing.
There was also a row of beach huts (not sure if that was Gorleston), and the arcade there.
They showed the Ramsholt Arms, a gorgeous pub opposite side of the Deben from Woodbridge. And Shingle Street, and Halesworth.
If you don't like feel good films, then not for you. I really came out feeling happy and buzzing.