It's there again this morning (Tuesday 3rd). Looks impressive to see something full-sized in there.
On a related topic I notice this on the LCY website :
"ScotAirways is set to introduce additional flights on its already successful Edinburgh to London City route with the imminent launch [Monday 9 May] of its first jet aircraft.
The introduction of the BAe 146 jet, which has a seating capacity of 80, will bring with it an additional daily return flight at key business travel times.
Departing from Edinburgh at 07.50 the new jet aircraft will return from London City at 17.15."
Seems unusual to do just one round trip a day and stand at LCY all day. Are they using someone else's aircraft - Euromanx maybe ?