Sir Herbert...we tend not to pass any traffic information to a/c at the holding point which could be misconstrued as a conditional clearance eg "I'll get you away after the next inbound".
what about "Hold A1 - landing aircraft at 4 and 8 miles"
after all it is quite common to hear "can you accept an immediate? 737 on X mile final". I don't think that's ever been misconstrued as "Cleared for immediate.. etc etc"