Beef used to be a really cheap meat compared to chicken. Dripping would be made exactly as BM remembers beef had more fat years ago and it was the juices and fat from the roasting meat that was drained into a bowl and cooled. the meat juice would sink to the bottom the fat rise to the top. We used to have dripping on toast for Sunday tea, lashings of salt. The fat that was left by the following Sunday would be used to roast the potatoes in.