I don't think this way of trade is even legal according to Bretonia. Trade with the Outcast is alright, but not via the Taus, as there is a high possibility that the goods are captured by Gallia. From the Bretonian Charter of Interstellar Law:
"2.1 - Embargo Lines
2.1.1 - Leeds Embargo
With the severing of the New London and Newcastle jump connections to Leeds and the Fall of the system to Gallic control, strictly no trade is allowed via anomaly from New London or Dublin. Those supplying the war front should travel discreetly via Manchester or Magellan.
2.1.2 - Tau Embargo and Tax
Although the Tau gate is no longer under Bretonian control, the Tau embargo line remains in effect for traders heading west of the Battleship Sterling in Dundee or north of the lane network in Newcastle.
Cargo being moved across the Tau Embargo in greater quantities than 1000 units will be charged 500,000 credits for standard cargo, and 1,500,000 credits for ores of any amount. Ships carrying less than 1000 units will be charged 100,000 credits for standard cargo and 500,000 credits for ore.
2.2 - Powers of Embargo-Enforcing Lawful Entities
BAF and BPA pilots have the right to demand the destination of traders and confirm it via intel. Those found to be trading with Gallia will be deemed in violation of 4.2 - Assisting Hostile Forces.
Traders found to be attempting to break the embargo must drop their cargo or turn it over at a Bretonian base, and may also incur a 4,000,000 credit fine if they do not cooperate.
Fleeing the scene before complying with demands will be taken as an attempt at breaking the embargo."
Perhaps a few amendments should be made. I leave it to the War Cabinet to vote on, if they see this post. I'm no longer there, had to leave due to RL.