Bought a cheap inspection camera off the net last week, Thought Id stick it far down the barrel of my MK1 Britannia air rifle to see why there is so much rust and crap coming out when cleaning and well....I dont think it looks good

Here are some images:
https://www.flickr.com/photos/152900...57697775756641

Tell me, how bad do you think it is? Is my poor old Britannia bound to become a wall piece or will it shoot straight again?

Was planning on restoring the rifle (cosmetically poor/ok) but if it is bound to be a wall hanger I might not.