If you like Vaughan Williams, you might also explore
Malcolm Arnold (e.g., Beckus the Dandipratt, Eight English Dances, Four Scottish Dances, Symphony No. 2)
Frank Bridge (e.g., Cherry Ripe, Sally in our Alley, Sir Roger de Coverley, Suite for String Orchestra)
George Butterworth (e.g., A Shropshire Lad, The Banks of Green Willow)
Hubert Parry (e.g., Lady Radnor's Suite)
.