It was a cheap food being just fat drained from meat - but yummy all the same.
We had it as well - with salt sprinkled on - all very bad for us by today's standards.
If you believe it that is.
Fat is bad for us full stop! So they tell us !
However my great grandfather used to love eating chunks of Lamb fat - make me feel sick at the thought to be honest but he lived to be a good old age so
to those who tell us what we can and can't eat/drink!