The rendering of my Joomla website template has started to cause problems. There have been no updates, so I can't put a cause on why it has started happening now. But there are two issues.
The first is that the internal pages will only show the entire template when refreshed. The second is that the shopping cart is now showing the Joomla 'code' alongside the data entry boxes instead of the proper description. Can be seen here: www.beer-mats.net. The site was working perfectly.
I suspect that this is a very quick fix for someone that knows what they are doing and I haven't got the time to look.