Lalla hasn't done any Target readings that I'm aware of, so this is quite a rare event (I actually had expected them to get Tom Baker).
Nope that's correct the only Romana 2 Target story done to date is Creature From The Pit, which Tom read.
It would have been good to finally hear Tom read the other lines, but Lalla (and John Leeson) seem to have Shada on the brain.
This is the 4th Shada Lalla has done - the original, the McGann, the Ian Levine animation preceed it, whilst John Leeson clocks up Big Finish, Animation and Book.
Which is equally impressive, considering he didn't play K9 that season!