Being the opposite of a gain monster I use a 12AT7 in my V1 position and 5751s in the other two pre-amp positions - so original Mullards are easy to come by.
But I do need to replace my EL84s - These new Mullards, they are made by New Sensor who make all the Russian tubes, so aren't these just Sovteks with an new/old name? What is different between these and matched Sovteks?
Damn, maybe I'll get some to try them out.