I've seen 2 lads on bikes a few times (currently 4) since moving here in January. I've seen them looking into cars on our street (including one over the road). They broke into one around the corner last month and 'did one'. I called the police and they came around, took details.
3 nights later they were back, again I called the police, they asked where I was so I told them, they claimed it didn't exist on their system, so what's my real postcode. Again I told them. Explained it was a new estate, told them 3 times how to get here (annoying as the response station is 2 minutes down the road...). Again, they doubted me. I explained once more, to which he asked (demanded) for my name, address, date of birth and phone number. I gave them over. Waited for 90 minutes and the police didn't even bother coming around. Stupid.