The Dreaded Transmission Charges

From way back when I was involved in modelling power station revenues and the like I recall the issue of transmission charges being a significant problem for remote northern-located stations. I must admit that I've rather taken my eye off this particular ball so I was interested to note an article recently suggesting that Scottish Power were not going to enter Longannet PS into the first capacity auction because of "disproportionate transmission charging penalties". This is despite the fact that the latest transmission charging methodology should actually reduce (but not eliminate) the penalty faced by remote stations.