Yes, a better and kinder way would obviously be to send the pitbull lawyers without prior warning, and let them have their go. People wouldn't complain on forums if *that* happened!
:lol:
Dude the correct way is always the discreet way, first you email/PM you try to contact without involving - just for example - the entire internet Amiga community

Because when you do not take the discreet route you are yourself doing harm to anothers image and reputation by making out that what might have been an honest mistake was willful and intentional.
That harm is legally a real thing that can itself be illegal. You aren't meant to go around potentially libelling people - and "blueyonder.co.uk" is UK hosted and we do have some of the worst libel laws in the world btw - as your first course of action.
It's just not a sensible thing to do, especially when you don't even hold the Trademark in that country:
http://www.ipo.gov.uk/t-find-adp?propnum=0896292001.
So yes, the right thing to do, if the Trademark owner was interested in this matter at all, would be to have engaged the lawyers to politely send a letter. It's not threatening, it's a request and it's the proper route.
It can be scary to receive one from a lawyer but it's the correct, and discreet, route.