A police operation which saw officers spray smart water on off road bikers behaving badly led to a 64 per cent drop in complaints about the antisocial activity.
Operation Jewel took place in the final three months of last year with officers specially trained to use canisters filled with the high tech water. The substance contains 'microdots' and leaves a mark, which can be traced by police.
A meeting of Midlothian Police, Fire and Rescue Board heard police seized two off road bikes, carried out five property searches and recovered a stolen bike as a result of the operation.