Old 35mm SLR

I've been making an attempt to "declutter" my house and I came across my old 35mm SLR. I invested ten quid in a new battery and switched it on. Hey presto it works! Now I need to get a film for it and give it a go again. As you can see it needs a bit of clean.

It must be more than 10 years since I've used a film camera so this might be interesting!