Don't believe all you see on TV ! the Firing range is at Lulworth in Dorset where the Tanks do fire live rounds, they most certainly could Not fire a shell from a Frigate out at sea to land inland, that was pure simulation, and the final "Special Effects" explosion was probably one of the old Saracen target wrecks that are already on the range , you can be sure it was Not the Stalwart blowing up, .
PS. don't think Richard Hammond died in the explosion either !