At this time of the year and with all the damp weather then tomato blight is a big problem for some of us, I have posts about tomato blight HERE .
Further to this I have a new Tomato Growing video page and you will find two new excellent videos from a US blog I follow called 'Growing ideas for Johnny's selected seeds.'
These videos give some great advice and will also help you spot blight. I also plan to add more video sections as I find them, as all videos on Youtube can be displayed on any blog or website.