That would be fine if the EGPH radar guys could send them down the ILS 2.5 miles apart when able and the deps came off a different runway as at EGLL.
However, viewing the situation from the sidelines these days (TAY) it amazes me how inconsistent the final approach gaps are between watches at PH and also how bad some approach controllers are at managing the lower levels of the hold.
Also, with the introduction of the "gates" PH now get the aircraft in predictable places dependant on the runway in use so they have few reasons to complain.
There are improvements needed all round, some at ScACC and some at PH, but unless the hold is moved further from the airfield, 10,000 feet at TARTN is a bit of a dream.