A lagoon would be considerably less expensive than an equivalent tidal barrage. The Atkins' report is available on the Tidal Electric web site.
The Sustainable Development Commission report recommended that a tidal lagoon pilot should proceed in parallel with the review of the Severn Barrage project.
Let's get on with both. Either way, we might avoid some or all of the nuclear options.
BRIAN A CHEETHAM (M), Brian Cheetham Partnership, 51 Wallace Fields, Epsom, Surrey, KT17 3AX