As explained to Laffin Assasin here I decided upon this nominal sum rather than my original intention of only donating a penny because I am aware of examples whereby £1 has been accepted for this purpose. For example: Russian oligarch buys British newspaper for nominal sum.
I could not help but notice this further example of a McCann inconsistency. It is advertised as a “Don’t Give Up On Me T-Shirt” but then goes onto say: The front has the text “Dont You Forget About Me” and the rear has the web site addresses. Madeleines picture is shown on the front and the back. Apart from the first and last words being the same, the three words in the middle are obviously different.
I would not have raised this little issue, but it reminds me of everything about the McCanns saying one thing when something else is the case in fact.