I came to England in 1973 - 74. A pond was loosing fish at a record rate. All the fish were captured, moved to a holding pond and the original lake drained. Heavy equipment was moved in (this is when I arrived) and the bottom was removed. What was removed was exactly 1.33 meters of luncheon meat. As best I remember the pond was 3 or 4, maybe 5 acres. I remember, although I had come home, the water to refill the pond had to be trucked in from a nearby river source.
Lets take the mid point of your area estimate and call it 4 acres 1 acre = 4840 square yards or roughly 4047 square metres
Now I don't imagine the layer of 1'33 metres was over the whole lake, or else
total amount of luncheon meat is 4047 X 4 x 1.33 = 21528 cubic metres. It is a big lorry that carries 5 cubic metres, and it would need 8588 such lorries.
Far more likely the 1.33 metres refers to the depth of luncheon meat in the swim nearest to the car park - even so, it is a lot - a lot of meat, and a lot of money, even at low-end supermarket prices.
I have fished at Redmire once (spent a week there and was pleased to catch carp, eels and gudgeon - the three species known to be there) One swim I avoided - it was shimmering gold, due to a carpet of sweet corn (or maybe maize) covering the bottom, and showing a fungal growth. The carp avoided that swim also - never saw a fish near it all week. Evidently the anglers you "will never understand" turn up everywhere - in those days anglers were vetted closely before being allowed to fish Redmire
World species 471 : UK species 105 : English species 95 .
Certhia's world species - 215
Eclectic "husband and wife combined" world species 501
"Nothing matters very much, few things matter at all" - Plato
...only things like fresh bait and cold beer...