Yes, home security signs are able to deter intrusions in Manchester
Various studies say security signs are a good idea when attempting to deter an intrusion. The idea is that the thief will see the signage and quickly make the decision that your residence is way too risky. After all, why stress over surveillance systems and motion detectors when a thief can pivot to a more vulnerable house somewhere else?
With that being said, the same reports show that a visible display ranks fairly low as a deterrent to crime. A well-placed sign mostly puts off less experienced prowlers, but seasoned thieves might want to discover the extent of security that is actually shielding your house prior to moving on. Other equipment, like outdoor video cameras, are more effective at preventing an intrusion.