Thanks Trojan, that was all very useful.
Unfortunately this is being delt with by a police force just outside the juristiction of the Met, so your kind offer of help wont be needed.
Seeing as what they tried to steal wasn’t a bike, I feel that it’s pretty unlikely that they will be on this forum, so maybe I can give a bit more info.
They obviously came prepared to steal my trailer (not a cheap open style, rather a big box trailer) which was chained to an anchor.
I caught them at it while one of them bolt cropped the chain. He ran off and disposed of the bolt croppers very nearby, which I later collected. The bolt croppers are brand new, obviously bought just to do this job and I made sure not to add any further fingerprints/DNA to them myself. A police officer collected these yesterday and said that they would be going to the forensics lab to be analysed, but this could take a few weeks. They also took away a piece of broken chain to link the bolt croppers to the job.
While Mr Bolt Cropper ran in one direction, his mates drove off in the other and I made a note of the registration number and type of car. Mr BC, now without his ‘tool’, walked back to join his mates while I was dialing 999. A lot of this information is from a neighbour who saw all this happen too.
After reporting it all to the Crime Reporting Bureau, I went to make sure I could still secure the trailer. Actually, I think my temporary fix is better than my original efforts, but more ‘security’ is in the post to me as we speak.
I also parked my car in such a way as to block the trailer in. Later that evening I got a phone call from the same neighbour. They had seen some ‘dodgy looking men’ searching the area where the bolt croppers were left and also giving my trailer and car a good looking over. They turned up this time in a different car and my neighbour has reported all this to the police as well. Anyway, next morning, I go out to find a large deep scratch on the rear of my car.
So, to answer your questions directly…
Yes, I believe that it is being investigated as attempted robbery.
I spent 30 mins on the phone giving a full statement of events to the Crime Reporting Bureau
And thanks for all the other tips. Obviously, if they turned up in a car with dodgy plates/stolen etc and this was their first job ever, then they may have got away with it but I have a strong feeling that they can be traced.