I help people use data to reduce crime. Associate Professor at @UCLCrimeScience. Former police officer.

Nottingham and London, UK
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No idea. You could find out with either a sampled street audit or analysis of video (eg from bus CCTV) but either would take a while and be moderately expensive.
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Oh come on, that’s just silly. There’s plenty to criticise the Mayor about when it comes to transport policy without putting words in his mouth. And it doesn’t help the case you’re trying to make at all.
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That’s why organisations like Living Streets are campaigning to make it easier to ban pavement parking outside London.
Aideen’s story has sparked an overwhelming response, showing the real impact that pavement parking has on people’s daily lives across the UK. This is why we are campaigning to end pavement parking. birminghammail.co.uk/news/mi…
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I’m not saying it doesn’t happen in London. Lots of illegal things happening in London. What I’m saying is that I don’t think it’s the same widespread problem it is elsewhere, where it isn’t unusual to see entire streets lined both sides with cars parked on pavements.
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This huge replication (🇺🇸) of the 'Koper curve' on how long hotspot patrols should last reinforces the original findings: patrols are effective once cops are in a hotspot for 15 mins, after which staying in that area has no extra crime-prevention effect. doi.org/10.1111/1745-9133.70…
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There isn’t typically a widespread problem with motor vehicles parking on footways in London because it is an offence to do so. What London does need, though, is much more bike parking space.
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Replying to @PizaEric
Mistakes happen. What matters is what people do to make mistakes discoverable and then what they do when mistakes are identified. Well done to you and your colleagues for doing the right thing!
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Traffic there could certainly be improved by making them red routes rather than the current mix of single yellows and parking bays. If necessary both Welbeck St and Wimpole St be made buses only, although doing that with Wigmore St would be harder.
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Useful estimates in this paper of how long it takes for crimes of different types of be reported and recorded (🇺🇸), i.e. how long it takes for crime data to be 'stable' enough for research and analysis. For most types, >90% are reported within 14 days. doi.org/10.1080/07418825.202…
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It’s about 70 buses per hour, not 300. TfL have released a map of where the buses will stop once the pedestrianisation happens.
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Then you’ll understand that one of the core roles of the police is to investigate suspicious circumstances based on limited, imperfect and often contradictory information.
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Yes, hence my point about people being encouraged to report suspicious circumstances even if they’re not sure exactly what’s happening.
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I don’t think that’s quite fair. Governments around the world encourage people to report suspicious circumstances even if it’s not entirely clear what’s happening. Similarly we expect police to investigate suspicious circumstances to find out what crimes (if any) have occurred.
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Replying to @DannyShawNews
CT investigations aren't my area at all, but it also seems hard to believe they would have been bailed if any explosives had been found at the scene.
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Replying to @CrimeDecoder
Interesting. I know two of the authors (you might know them, too) so I've flagged this to them so they can look at it. Thanks.
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No. If anything, the government has a strong incentive to send a message by prosecuting gig-economy terrorists as harshly as possible to discourage others. You can also see that in the convictions in the ‘minions’ case.
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This paper finds the 'iron rule' that most crimes happen in a small number of places applies equally in an African city (Abuja, 🇳🇬) and when measured using data from a door-to-door survey rather than police data (which is limited by under-reporting). doi.org/10.1057/s41300-026-0…
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Replying to @AchingRat
She’s been a police officer for 10 years. You may not like direct entry (as if the quality of leadership by chiefs who started as PCs is anything to shout about) but you might as well be accurate about the record of the person you’re complaining about.
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Replying to @jenniferdoleac
Yes, I was really shocked by that finding! I recently didn’t submit a quasi-experiment (a diff-in-diff with two-way fixed effects) to them because I wasn’t sure it would be well received. 🤷‍♂️
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There’s no reason both can’t be true: counter-terror police/MI5 were tracking a plot to gather the maximum evidence and intelligence, and while they were doing so a member of the public saw something suspicious and phoned it in.
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