Thanks for all your kind advice. Got some Poachers Alarms ordered, got my CCTV camera up with audio set up too, even stronger padlocks than the one they cut off, motorbike chains wrapped around the gates with even larger padlocks, also alarmed all runs. Got the lamp ready and a nice surprise waiting for them if they come back! Stayed up til 6 this morning; I'm sure that's gonna be the same tonight. No PMs yet with a name of a culprit but I'm sure someone out there will hear someone boasting. Pleas PM me if anybody knows anything.
Cheers again,
David