"Duncan Lyall" wrote
I have been growing tomatos outside in the soil in my garden 20 miles
north of London in the UK for a number of years now.

I never grow them in the same place two years running although my
favorite bed, the one I used this year, hosts a crop every two years.

The bed faces West and is backed by a larch lap fence.

I fed at planting with pelleted chicken manure and then regularly with
Miracle Grow (last years batch).

This year, for the first time I grew potatos in the bed next door,
they have performed well and have shown no sign of blight (as far as I
can tell).

This year I have had an almost total crop failure.

Pictures here http://80.71.2.34:8815/tomatos/index.html show the
current state of the crop.

I will miss my home grown tomato soup this winter.

Can anyone tell me what has gone wrong ?

Blight!
Pull up and burn all affected plants/fruit, do not compost any part of them,
and don't plant Toms or spuds in that spot for 5+ years. Infected fruit will
rot.

Have you had much rain your way recently or do you spray the plants with
water? It is brought on by free floating spores in the air landing on leaves
that are wet/moist, if the plant is kept dry these spores can't do any
damage.
Watch your spuds as they usually get this problem first.

--
Regards
Bob
In Runnymede, 17 miles West of London