Every week there's another statue(or stone/plaque/other) unveiled to somebody good or to mark a memorable thing, but I've never seen or heard about any statues being taken away. They tend to be quite solid, long-lasting things, so won't the country end up knee deep in these things eventually? I know some get nicked for scrap but they generally get replaced on principle.
I think it's a very, very slow disaster happening. People should stop worrying about immigrants and start worrying about statues.