Re...various
Stepladder - it was a standard V shaped builders one and definitely not from the runway works. No one's owning up yet, but most almost certainly left on an aircraft wing or similar - no vehicles other than the inspection vehicle were on the runway between inspections.
Air Berlin - no way they're going to Aviance given that they've just had to move satellites because they couldn't get out of the Servisair contract
Air Sylhet - they'll be starting their new service in December with (I think) Servisair handling