Hey Jeremy,
First of all I would like to extend the biggest thank you to you for coming back so quickly – I only posted 15 minutes. Second, you were absolutely right. Just after posting, I decided to view my recent plugins and sure enough there was one that I activated today which was causing the problem. Once I deleted it, my site came back on-line straight away. I guess I need to be careful with conflicts and learn not to panic ;-0 ??
Thanks again
ccameron x