The song I remember best from Crofton is Lillibullero - we had no idea what it meant and certainly no notion of any political association. As far as I can recall no-one ever gave any background or explanation. But the tune was rousing and we'd sing out at the tops of our voices.
As for the hymns, I always associate "Glad That I Live Am I" with Crofton Juniors. It always made me feel good, the line about blue sky just somehow uplifting. And most oddly, whever I hear it I think of dinosoars. I recall singing it in assembly then going straight into Mrs Hayton and history lessons. Those lessons began with being shown how dinosoars roamed the earth under blue skies millions of years ago. She would show us fossils and pictures of tropical swamps with Brontosoaruses and Tricerotops, and I must have been carrying the tune in my head. It still works, I can't hear the tune without thinking of dinosoars and whenever dinosoars are mentioned, I hum the tune. Doing it right now!