Every Premium check unlocked on the property you choose. No card, nothing to cancel, and no clock running down while you are not house-hunting. Come back to it any time and it stays free.
Signing up also saves St John the Baptist Church of England Voluntary Aided Primary School Pebmarsh and Holy Trinity Church of England Voluntary Controlled Primary School, Halstead to your shortlist, so you are told when Essex republishes their admission distances.