My Brompton was stolen yesterday, 09.01.2018 between 17:20 and 17:50 while I was buying dinner. It was right outside Sainsbury's local, two meters away from the shop entrance where a CCTV and a security guard had a clear view on the bike. The thieves, apparently a group of youngsters, managed to cut the cable lock and ran away before anyone intervened. I had assumed that a cable lock would be enough if I'm only gone for a few minutes, but apparently that was stupid, and I have learnt an expensive lesson.
The police has decided to close the case, as far as I understand without asking for the CCTV footage from Sainsbury's (which the store has, but will only give to police), or speaking to their security guard. This is the second bike I am losing within a year, and I am probably giving up on owning a nice bike. Hooray, Boris bikes.
Even though I have not much hope, I will be grateful for any hints that help me recover my bike. Here's a picture and some more details. https://stolen-bikes.co.uk/stolen-bikes/brompton-bicycle-s6l-2/
The bike is a 6-speed model with mudguards and rack, SON hub dynamo, red main frame with white parts, and has the words "Demo Bike" instead of the Brompton logo on one side.
Thank you for reading this. If nothing else, it is another cautionary tale. Please use a good lock, even if it's just for a minute.