Don't know if it has been adoptd at certain airports, but i recall a trial at several units to not use conditional clearances in an attempt to reduce the number of runway incursions. At the time we controllers said it would slow things down, especially at the busier units, however the powers thet be deemed that we would do it anyway.
If this is the case and it has been adopted at EGCC the prepare for more holding and more go arounds.