In article , IZI.2e87ae6
@gardenbanter.co.uk says...

hi everyone, i am a new member so hello to all! this year i didn't do
tomatoes as i had a bad experience with blight a while back. however i
would like to try again and wondered if anyone could help with the
following, how to control blight and as i am in a northern climate can
you suggest hardy varieties that would stand up to being grown outside
in a chillier climate! thanx izi

What northern climate?

There's real variability in northern climates.