The advantages of heat pumps are never ending, they’re an all in one energy efficient heating and cooling system that are used in homes across the country. They use extract thermal energy from the air, water or ground and pump into your home. Air source heat pumps absorb heat from the outside air. This heat can then be used to heat radiators, underfloor heating systems or warm air convectors and hot water in your home.
Last year the European Heat Pump Market and Statistics Report 2015 concluded that there was a 3% rise in the amount of heat pumps being sold, showing that heat pumps are becoming a trend.
http://www.ac-direct.co.uk/news/heat-pumps-solar/the-benefits-of-installing-heat-pumps-in-your-home.php
AC Direct have put together some of the benefits of using an air source heat 
pump:
Ground source heat pumps use pipes which are buried in the garden to extract heat from the ground. Again this heat can also be used to heat radiators, underfloor, water and warm air heating systems.
Here are some of the benefits of ground source heat pumps: