Any recommendations for a compost to pot-on tomatoes that is not too heavy,
but on the other hand does not let the water run straight through?
I've usually used J Arthur Bowers 'seed and potting', but it's difficult to
get locally and necessitates a 25 mile round trip to the nearest place to
buy, whereas I have about three or four garden centres, a B&Q & a Homebase
within a 10 mile trip to buy an alternative. I tried one different one a
couple of years ago when I couldn't find the JAB, and the water just ran
through (can't remember what it was called unfortunately).

I've wasted the best part of a bag of JAB having potted on most of the
tomatoes which developed mosaic virus so have had a good clean out and
disinfectant of the greenhouse. I've now got later ones coming on in my
conservatory which I will put out in the greenhouse and hope! I've put a
good sized test replacement from my neighbour in the disinfected greenhouse
and watching for any signs of the virus before I put the others out there.
Any advise or experience of this virus will be very welcome.

Ros