D&F,
Thanks for that.I did think it was the Skinny Jet.Just as a side line I work at a unit which hasn't the same restrictions as EDI and the TMA,and we have quite a problem with EMB145/135.
When they are left to their own CDA profile,a large percentage end up too high.This involves extra routings,mucks up the sequence,and can make you last.Therefore you end up worse off on fuel,as you aren't number 1 anymore and flogging around at 160kts at low level.
I have seen other aircraft types do CDA's very well.If the TARTN FL100 restriction was lifted,then what are the chances of being too high at EDI as well?