VLM's overall schedules require 18 aircraft, all of which come through London City at some time during the day, plus they do a lot of ACMI charters round Europe. None of their aircraft overnight at London City, and VLM have never done so.
Two BA RJ100, two Swiss RJ100, one Cityjet RJ100 and one Scot Do328 are the overnighters this summer. The Scot acts as a spare aircraft until 1700 (I can see the morning Edinburgh return flight that Cityjet operate for Scot reverting to this aircraft fairly soon).
An early departure is 0730 Cityjet to Dublin (hooray ! at last) and this is operated with an aircraft which starts at Paris at 0700 and is into LCY at 0700. It is interesting to speculate what would change if the UK and Continental time were the same.