Bike advice sought

In short, there's a crack in the downtube of my bike after I fell. I didn't notice it until it was pointed out to me at a bike shop. I apparently drove my bike into the ground harder than I realised.

I'm not yet reassured that it's safe to ride again. I've been reading lots of threads from forums (Declan even started one on my behalf). Thanks to everyone who has offered me alternate bikes to ride.

I'm trying to gather as much information as I can before I make a final decision on what to do and anyone who has any additional advice please don't hesitate to send me an email.