Utilities refers to the costs associated with providing gas, electricity and water to any parts of the common areas that need them. These are billed in the service charge you pay.
They can include the heating and lighting of hallways, power to operate the lift, or the water supply to the cleaner’s cupboard.
If you're concerned about how the utilities in your building are being used then you should get in touch with your PMO, although it's worth bearing in mind that he or she will need to balance your concerns with those of fellow homeowners, as well as our obligations under the terms of your lease.