The Medway Handyman coughed up some electrons that declared:

eden wrote:
I need to dig 5 holes for 1m high picket fence - which of these tools
works most effectively?

I use one of these - amazing bit of kit. £20 for 5 holes, but you could
sell it afterwards.
http://www.wickes.co.uk/Builders-Too...er/invt/501584

Yep that's the one I used.