On a further note I used the address in the 'send a comment to the chairman' box, changing the standard UNISON message, to send a very supportive email to Mr Walsh asking him to keep going against BASSA. Thank you Unison.
I also have sent a message of support to BA, using the conveniently provided link.
I also wished to copy my e-mail to Unite but, strangely enough (or not) they do not actually publish on their web site an e-mail address.