Blowflies are active but the heatwave has lowered the risk of strike in sheep.

That said, the risk for blowfly strike in sheep is currently high throughout the country according to NADIS Parasite Forecast.

Professor Richard Wall from Bristol University said: "While blowflies are very active in the recent hot weather, the risk of strike is lower than might be expected, particularly for shorn ewes, because it is too dry for the maggots to survive.

"It is also too hot and dry for the parasitic worm larvae on pasture that lead to scouring in lambs. Scouring is one of the main factors that increase lamb susceptibility to blowfly strike.

"However, the strike risk will increase quickly once the dry weather breaks and so high levels of vigilance will be required."