RAF Fauld explosion happened in 1944.
Fauld is in Staffordshire, England, near Burton-on-Trent. On 27 November 1944 a large underground bomb depot blew up causing what many believe is the largest non-nuclear explosion ever.
No - Blithfield was always intended as a drinking water reservoir, and was planned before 1939. It was formed by building a dam to block the river Blith. Its history is here: http://www.blithfieldeducationcentre.co.uk/reservoir.htm You may be thinking of the explosion at RAF Fauld in 1944, when an underground munitions dump exploded with the loss of about 75 lives: http://en.wikipedia.org/wiki/RAF_Fauld_Explosion
Kingsland Explosion happened in 1917.
Mihăileşti explosion happened in 2004.
Oaks explosion happened in 1866.
Bidganeh explosion happened in 2011.
Clarkston explosion happened in 1971.
Vergarola explosion happened in 1946.
Delft Explosion happened in 1654.
Oppau explosion happened in 1921.
Drummond Mine explosion happened in 1837.
Lagos armoury explosion happened in 2002.