Hi Martin,
As far as the date is concerned, not a great deal of help really - but at least it will narrow it down a little.
'Back in the day' I used to write down the titles of all the singles I picked up, I stopped doing it in 1984, but on having a scan through the list today, about 20 titles from the end was this record, the date was 10th April 1984.
Actually I had written "Loving you is easy" + 3 EP but we know it's the same record.
As I said, it's not much to go on but at least it has to have been released before then, but as to it being a 70's or early 80's release - who knows?
Maybe someone else can recall getting one before then....?