The guy who built the site for me, (the arrangement is I look after his bike and he looks after the site ?? ), uses CPanel and he fortunately backed up the site on the 15th so he restored it last night.
It seems it was the site update to 4.1 and a theme update which caused this issue so rolling it back got the site back on line.
The thing is I’m unsure who hosts the site, all I do know is when I log in the bottom of the dashboard page says “Thank you for creating with WordPress”
Anyway it’s all sorted now ??