OT: deliver text as email (UK)

[Joe Mc Cool <joe@benburb.demon.co.uk>]

Please,

how can I use my woody box to send free text messages to a mobile phone 
(in the UK) ?

My google searches have come up with nothing.

Surely there has to be a web site somewhere that I can email and it will 
forward the text on my behalf to a designated mobile number.

I have in mind something that I cobble together on the command line.

Thanks a lot.

Joe Mc Cool