110% of LATCC TSF? Errr .. not exactly...
The initial TSFs at NERC were largely LESS than those at LATCC. The 110% you mention is relative to those rates, not the LATCC ones.
E.G. SFD TSF at LATCC 50/60 (subject to certain conditions). S18 TSF at NERC 48/60... no explanation, except perhaps giving room for "artificial" rises to spin into "good" news.
Further... LATCC used staff a lot more efficiently than Swanwick EVER will.
Rgds BEX