u/SmoothMinimum1126

I recently moved to a new house and have absolutely no idea about how the heating systems work in the UK. After researching I have found that I have an Ideal Logic Heat H15 heat only boiler and a therma evocyl hot water tank that stores hot water. How do I go about this if someone has any suggestions on the boiler temperature and the heating settings for higher efficiency and less heat bills would be really appreciated. Also please point me to the right references if any