Just a quick note to acknowledge, with thanks the replies I have had.
Going out this morning to help a friend whose car has broken down, so will read the replies when I come back later hopefully I'll find the answers I need there.
(don't worry it's not an electrical fault the car has).
Recently bought a house .Was up in loft putting down insulation when I noticed that what I believe is a 20amp 4 terminal junction box had a twin and earth cable coming out which was about a metre long and sealed off with insulation tape ie not attached to anything.
Down in the kitchen is a 2...