So just like parts of Ireland then.
For many years the Croydon CC in Ystradfelte used a shake hole near LNRC as a source of spare parts for its Calor gas cooker !
I can remember looking for a cave in Co. Clare once, it turned out to be way off the beaten track and down a long forestry ride. When we eventually found the shakehole entrance it was clogged up with dumped washing machines, fridges, cookers, etc. This had obviously been standard practice for an area which didn't seem to bother with such niceities as regular rubbish collections or local authority refuse disposal sites.
Used to happen in Derbyshire once too: several mine shafts in the Peak District were descended by cavers in the 1960s only to find drums of cyanide at the bottom. Fly tipping from the Sheffield steel works it seems! Luckily we had the Environment Agency to complain to and we got it stopped.