How Loch Long became a magnet for Scotland’s plastic waste

All of these political rows have been frustrating to people who just want to see the marine environment free of litter.

Kirsty Crawford from the Marine Conservation Society (MCS) says it’s vital for places like Arrochar that the current target date of 2027 is not pushed back again.

She said: “With each fresh high tide you’re going to get more litter washing in.

“It is a big task at hand but this is where we hope the deposit return scheme would help see a reduction in that problem.”

The scheme in Ireland went live a year ago and more than 900 million items have so far been returned to shops.

Consumers have to pay a deposit of 15 cents for every standard-sized plastic bottle or can which is purchased. The deposit is refunded when the item is returned.

Glass is not included in the scheme.

Some retailers were initially resistant, but others say it has led to an increase in footfall in shops.

Reverse vending machines can cost shop owners about €15,000 (£12,500), but stores do have the option of collecting returned items over the counter.