But during the 20th and 21st centuries a decline in fertility rates and an improved life expectancy has changed the age structure of the population.St Peters has aisled nave, chancel with north vestry and a south-west tower overlooking the porch.The church commissioned a window depicting marriage, which was installed in February 2010 and designed by Alan Davis.The village shop has been subsequently been refurbished by a local family and reopened as "Coopers of Elwick", not only offering groceries but now also incorporating a tea room.Managed by the Parish Council and supported by grants, the village has been able to install a good variety of play equipment.This has caused significant additional distance for villagers wanting to leave to the north or enter from the south in the A19.[19] EON, the energy supplier, has put in place three wind turbines on the border of the parish.Built in the mid-19th century and grade two listed on 8 January 1980, this windmill has been protected and preserved as a piece of Elwick's history.[26] Elwick's main resource is its fertile land, with many farms near by; and a windy climate supporting its wind turbines to produce electricity.