Oi R5,
Don't go encouraging people to call Thames Radar to transit the LCY Control Zone. The airport is geeting so busy that zone transits will become the exception rather than the rule. If the workload is high or the primary service to IFR traffic to EGKB and EGLC is compromised, I am not even to consider issuing a zone clearance. Just because it sounds quiet on the frequency doesn't mean that we are quiet. That amount of telephone co-ordination that goes on is phenomenal - four phone calls for each IFR outbound movement from each airport for a start.