Not quite sure I would see the correlation. Surely, one would increase stop&search to prevent crimes from happening, no? I can only see that the police is currently faced with too much red tape and bureaucratic non-sense every time they try to intervene (stops, hand cuffs, pursuit,etc), that any officer probably is not too keen to risk his/her livelihood as the following read demonstrates https://bikerandbike.co.uk/the-bike-crime-epidemic-part-3-the-devastating-consequences-for-police-who-try-to-stop-bike-thieves/