I assume from the above (it's not quite clear and neither is the LCY website) that the Jet Centre operation has passed (passed back ?) from Netjets to the airport themselves.
Maybe connected, but I've noticed a real upsurge in business jet traffic in and out in the past couple of weeks. This last weekend their ramp was pretty full, haven't seen that for a long time. Even during the Olympics there was hardly anything in there.