On Sun, 11 Oct 2015 19:43:35 +0100, Norman Wells wrote:

You can't have a legally binding contract without being certain it
has
been read. Which would normally need a signature. And maybe even a
witness.

Oh yes you can.

In English law a contract can be formed by just saying in "yes".

"Dave, are you free to do Everton on Saturday?"
"Yes"

Contract is formed...

--
Cheers
Dave.