Thank you for the replies. You’ve really helped me and also confirmed my fears about the credibility. I could work around it if I was precious about keeping the explosive in but really it was just a contrivance to get water into the tunnel, so I'm happy to get water into the tunnel in another way.
The demolition occurs in Zone 3ish – Stroud Green/Seven Sisters area. The street gang have raided the North London site and have taken the explosives back to their ‘endz’ in East London (near Walthamstow). The protags come across them trying to steal their car rims in a high-rise block of flats' car park and in the ensuing scuffle, the kids flee dropping the bag. (They were trying to rig the high-rise to blow - a sort of reference to the broken and disenfranchised young people I come across most days in my work, and the Tottenham Riots which occurred on my doorstep).
Regarding the tunnel: It did not have to be a massive explosion, just needed to get water into the tunnel somehow; my wip initially starts as a death-on-the-tube mystery but it heavily references West African folklore, and ends up with a battle between a Sierra Leonean deity (Ayo) helped by ‘Mami Wata’ (who is – for the sake of simplicity in this thread - a good luck or bad luck spirit) and the nebulous ‘monster’.
In African folklore, Mami Wata exists traditionally around where there is water and so for her to assist Ayo, I need to get water into the tunnel.
Funnily enough I was led to the Semtex route simply because a third player is constructing and demolishing various sites around London and the South Coast and I figured it would interweave his role more significantly if I linked his presence more robustly with an additional story thread. I was so caught up in it that I don’t think I saw the goofiness of the idea.
Re igniters etc, I
did do my research there, but what I couldn’t find out was how easy it would be to get hold of. Thanks for the reminder of the physics of the blast, Vertigo, that was something I was going to look into later in depth but you have saved me that trial!
Okay, afterthought….. there is a minor character who
could be integrated because he knows how to use explosive as he is part of a demolition team in North London. I could combine two characters and place him within the team that go underground.
Does any of this make sense? I was trying to avoid a synopsis, which would turn people off from posting their ideas, but I’ll happily fill you in if it makes things easier.
Thanks for the comments and thoughts.
pH