Would-be hare coursers are being warned as the harvesting period approaches that it will not be tolerated.

The activity involves the pursuit of a hare with a greyhound, or another form of sight hound, and if the hare is caught it is usually killed.

Since 2005 hare coursing has been illegal in the UK.

Hertfordshire Constabulary said illegal gambling is usually at the heart of any hare coursing event and in some parts of the country thousands of pounds have been recovered from offenders taking part.

Sergeant Jamie Bartlett said: “Not only do illegal coursers and poachers trespass on private land, damage crops and property, but they also often steal property and can be abusive and intimidating to those who challenge them.

“There is also the matter of animal cruelty, frequent illegal gambling, driving stolen vehicles and using red diesel.

“With the advent of the new season upon us, I would like to reassure farmers and those who live and work in rural areas that we will be putting on extra patrols in areas where hare coursing is likely to take place.”