30W, as a S19 controller I would love to give you AVANT GROVE 1C, but this would mean the STAR starting at AVANT if I were to be doing my job properly, and if that was to be the case, then we'd also need a new STAR starting at 40 dme before BIG, and whatever the Lambourne restriction is too. Apply this to every other airfield and I think you'll need more fingers and toes to count the new ones on. I do agree that restrictions like the FL250 10nm before AVANT should be published and known, but as for now I'll still use the "expect" I always do.
Ideally I'd like to give you no routing at all, but we all know how useless your Ops Dept are at filing flightplans
