With apologies to the Late Andrew Sachs....I know narthing...
Not helpful, I know. Always was a dangerous SID-busting neck of the woods. Didn't help with DET SIDs and ALKIN STARs conflicting over the appropriately-named Gravesend. Separation by intervention. Most dangerous sector I ever had to validate on. Glad to see the back of it. Other mugs can deal with all that.