Its not a shame.
Driving along happily listening to radio 2, then BANG all of a sudden you start getting a stutter then clunking noises and death to the engine follows with all valves gone potentially is way more of a shame than needing to service an engine.
Well yes, but replacing a fairly new belt (how much do they cost, by the way?) is also a shame just for lack of a service history
Also, that belt looks old and past it but isn't original but don't hold me to that. Oil over it corrodes the rubber, making it weak. I would change that, not a hard job. You get a look at bearings too then.
Get the oil mopped off everything, and sort out rocker cover gasket, tighten up bolts or new gasket. a couple of quid.
Sorry, not quite up to speed with fancy engine terms Is the rocker cover gasket the thing around the big oil reservoir thing (where one checks for mayo)? And just any bolts I can see? And what gasket do you suggest replacing? Sorry for all the questions!
Also I had a look in the Haynes about changing the cam belt and it rated it as a 5-spanner job is it really that easy? Mentions me needing to be able to tighten it to the correct tension etc etc!