Thanks for that John.
Did try one of those hand held saws once.
Was trying it out in my shed when the wife appeared and started to watch, I was making a right hash of it trying to cut a straight line.
The wife said, "Tha mekin a reight mess, cum art, let me show thi ", ( she's from Gods own county, Yorkshire), and proceeded to cut a perfectly straight line.

I sloped off very red faced and later gave the saw to a friend.
It's going to have to be electric I think, also, she has no idea how to use one of those and is banned from entering my shed for life anyway.

Mike.