Hughes was a prolific artist and his work has been exhibited all over the world. He is best known for his watercolours of landscapes, particularly those of the English countryside. His work is characterised by its delicate brushwork and subtle use of colour.
Hughes was also a teacher and taught at the Byam Shaw School of Art, the Royal College of Art and the Slade School of Fine Art. He was a Fellow of the Royal College of Art and an Honorary Member of the Royal Watercolour Society.
He died in London in 2002.