Not quite sure how it is causing delays to other aircraft? Please explain how this is, as I can't see from where it is parked to cause other effects.
LCY is heavily ramp-constrained, so if an aircraft goes tech it ends up blocking a stand and causing delays unless it can be towed off stand into a contingency parking place. There are not many contingency parking spots at LCY, and the Swiss RJ is occupying one. So its presence doesn't cause delays as long as everything else is running perfectly, but it exacerbates the delays that may occur if other aircraft go tech.
C.