NFU livestock adviser Joseph Keating has called on retailers and consumers to support UK sheep producers rather than buying imported New Zealand lamb.
UK farmers are losing about £29 on each lamb following a price collapse that has seen farmgate values plummet to their lowest levels for three years.
But the 17% drop in farmgate prices is not being matched by a drop in retail prices, which have fallen by just 2%.
The NFU has dubbed the widening gulf “the great lamb robbery” and has called on retailers to show commitment to the sector.
An influx of imported chilled New Zealand lamb is being blamed for undercutting UK sheep prices, with many farmers facing big losses.