Most of my Dartmouth intake had 'council house' twangs.....just like me
I was probably through BRNC about ten years before you, and I was one of about 5% who had been to public school (courtesy of the BSA), whereas even then the Sandhurst intake was about 60% public school, and now is about 40%. God knows what they thought of my dad's Bolton accent when he joined BRNC aged 13 in 1947 - he went on to be Commander of the Royal Yacht, by which time his accent was fairly neutral.