Just been in B&Q and saw this reduced from £60. Looking around the web it does seem to be typically £65 though Argos have it on offer too at the moment for £38 (down from £50) so £29 is a bargain,
Anyway, I bought one and for the price it's perfect. The Christmas tree is now in tiny pieces and it took 10 minutes and no effort. Full B&Q blurb is below.
The KS890ECN 400w Scorpion® powered handsaw from Black & Decker® cuts time and cuts effort. The multifunctional Scorpion® has both powered handsaw and jigsaw modes making it perfect for straight line or curved cuts. Fingertip variable speed control for safe and accurate cutting and tool-free push button blade change system for hassle free DIY. Capable of cutting wood, metal and plastic, the Scorpion is incredibly versatile. 3 saw blades included.