Central heating radiators are the most common type in the UK. With these radiators, heat is generated through water that's heated up by your boiler. This water then passes through pipes into the radiators throughout your home to provide heat.
With a central heating system, you will usually need to turn on every radiator in your home, which has both positives and negatives. This is efficient during the winter when you want your whole house to stay warm. However, if you have a cold spot in your home that you want to heat even on warmer days, turning on your entire central heating system for this one room is inefficient.