It took nine years, and cost more to renovate than the traditional  doing-up, but Penny Poyzer and Gil Schalom’s victorian semi in Nottingham now saves £800 a year in fuel bills. See how they did it (room by room!) and pick up a few tips for yourself. You don’t have to go as far as Nottingham, of course; our own Eco Warrior One Jon Cooke had an electricity bill below £2 (yes TWO pounds) last year!