OK, a slight diversion (apologies OP)...how much were the first portion of chips you remember buying ?
I seem to remember mine as a chippie on a long road, maybe 1/4 mile from the entrance to RAF Wyton when I must have been less than 11.
6d...sixpence....so before 1972.
One night a week mum would give us each sixpence and off we'd trot. Funny the things etched in your mind.
I'm just a little too young to remember pre-decimalisation. However I do remember chips being 10p a bag.
On another note, my mum worked in the chippy so we used to get free chips anyway.
We also got the job of going round the local estate asking for old newspapers for the Chip shop to wrap the chips. We got paid 50p per shopping trolley full. Of course this was way before anyone recycled and they banned newsprint from being used in chippies.