I'm thinking of booking a flight that departs LCY at 18:10 on a September Sunday (non holiday weekend).

I plan to check in on line the night before, carry just a roller bag onto an EMB + one laptop bag and arrive via DLR.

Flying economy. One World Ruby status only.

As I'm trying to maximize my time in London, what time shall I arrive at the airport in good time to clear security? Typically how long is the queue through security on a Sunday late afternoon?

Thanks in advance.