New Noise for the Seven

A couple of SAAB runs in the afternoon backwards and forwards really.

Then I had the option of a run in something - but what ?

Well I plumped for the Caterham as it's not been used much recently. Umm - a new noise appeared as we were only 1/2 a mile from home. An odd one like a belt slipping or a bearing crunching for a second or two. 

Then it went away only to return a few miles later so I turned around and came home - and it did not make the sound again. I'll check the belts etc.