frangatang
BAA - Outsource the cleaning to another company - It would appear that nobody actually checks if that other company gets round to carrying out such a task.
At LGW - I've noticed that various airlines & their cleaning companies regularly dump all sorts of rubbish on the Jet-ways. It is often unidentifiable; where such detritus has originated, and consequently is left until someone reports it. BAA - say contact the airline concerned - but, without CID and forensic investigation - Nobody knows anything.
Perhaps, they should return the skips to every stand; which were withdrawn some years ago!
BAA - as the airport operator/owner should not abrogate responsibility for the cleanliness of all areas and should check several times a day that all is well. - However, we're talking about BAA here. Enough said!