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As an ex-Court Listing Officer, it is 'highly likely' that HCJ's and above are 'available after lunch'. It could well be that the cases/actions listed for one or all of them today, may well have settled, been withdrawn etc. One of them would possibly have been on duty for an emergency matter. So it is feasable that their Lordships were available, and not hand-picked.
Often my experience in my past life.
Regards