abysmal, one of the reasons the victorians were so keen to introduce records, births deaths, marriages,, census etc, was because they realised that they had no idea who was where and what they were up to. it was quite common for prisoners to newgate to have completely different names each time and also get discharged by the magistrate because they were 'first time villains' when in fact they were old lags.
a good book to pick up is the 'italian boy' by sarah wise, is about a murder by resurectionists but she goes over the conditions of london and the state of the police at the time. it was a shambles basically and no one supported the 'new police' introduced by peel, they were considered a laughing stock and its a wonder they survived.
however, crime in the 19c was very much reduced from the 18c, which was much worse
you also need to consider that there was a growing acknowledgement that the amount of and severity of poverty was contributing to lawlessness, although most still believed that if you were poor it was your own fault and therefore any criminal behaviour was an indicator of why you were poor inthe first place.