Buenchico's answer will be the one puternut was looking for.
However, in response to the suggestion that my first answer was not true, Peter Auty's version charted in 1985 (at the same time as Aled Jones), albeit only in the lower regions of the charts.
http://www.chartstats...songinfo.php?id=13024
http://www.chartstats...songinfo.php?id=12970
Whether one classifies number 42 in the charts as a 'hit' or not is of course a debatable point. I suspect a number 42 single in 1985 probably sold as many copies as a top 10 single nowadays.