Pirate Operators on 70 Mhz.

I would like to ask your help in tracking down non ham radio operators who are illegally using the 70 Mhz band. There are at least 2 people using 70.375 Mhz as a business channel.
These people can be heard regularly during the day discussing their work and giving directions etc.
If you hear any transmissions can you please email me details, names or any locations given etc. This info I will pass on to COMREG.