Motocross bikers have caused thousands of pounds worth of damage to a farmer's field near the M25. 

Over the past two weeks, there have been several incidents of anti-social bikers damaging land at Warren Farm in Maple Cross, between junction 16 and 17. 

Herts Police have issued a warning that anyone caught riding illegally would be dealt with "robustly". 

PC Christian Gottmann, from the Rickmansworth Safer Neighbourhood Team, said: “The damage has had a severe impact on the owner’s livelihood. I want to stress that riding bikes across private farm land is illegal.

"If you see anyone riding anti-socially, or have any information about who might be responsible for the damage, please contact police straight away.

"Please try and get a good description of the rider and the colour of the helmet, if they are wearing one, and make a note of any registration numbers.”

If you are caught riding illegally or anti-socially, police can issue a written ‘section 59’ warning under the Police Reform Act 2002.

If you are caught again within the next 12 months, police have powers to seize your bike.

If offenders do not reclaim their bikes and pay storage or recovery fees within a 14 day period, their vehicles can be crushed.

Riders can also be reported for traffic offences.