Gef, the reason why there is'nt that many bins about these days in the UK is for sercurity reasons...Its very easy for a terrorist to drop a bomb into a litter bin and detonate it by remote control, and if they choose a bin that happens to be in a heavily populated area, say in a market place crowded with people, a single bin-bomb could take out hundreds of people.
In fact after 9-11 thousands of bins were removed from busy city streets for exactly this reason...Many of them in London, the city with the highest population in the UK.
People dropping fag-butts is another issue. (For American readers that means cigarette butts!)
I used to smoke, a long time ago, but now I am virralently anti-smoking.
If smoking were totally banned there would'nt be any fag-butts to worry about, but as that will never happen (Because the British government make lots of money from smoking) its a problem we will just have to live with.