Yup, it got us in the end. I've been convincing myself for weeks that the black marks on a few tomato leaves were nothing to worry about, since the rest of the plant looked so healthy.
But today I found this:
Only one plant has bitten the dust so far, although I'm considering destroying the one next to it, which was in contact with it. It has a few leaf marks but no other signs yet. And I harvested nearly a kilo of green tomatoes from the infected plant, which I'm hoping to use somehow. As you can see, we're getting plenty of ripe tomatoes now from our nine (now eight) plants.
Look at this - isn't it the weirdest looking tomato plant you've seen?
This is the Sub-Arctic Plenty, which has always looked sickly but has lovely large round ripe fruits. It's virtually blue! I've no idea what's wrong with it. I dunno - maybe it's supposed to look like this...?