A looped service means that your property is sharing the main power supply cable with another property (normally your neighbour). In some circumstances this could mean that your main fuse is not suitable for an EV charger or cannot be upgraded.
Typically, if you have one cable running to your main fuse then you do not have a looped service. If you have two cables this would indicate a looped service.
This is located in the electricity meter box on your property.
For clarification please ask your power distribution network operator (DNO), they will be able to tell from your records.
