Been a while since i have been around the site for a prolonged period and was having major issues trying to get in to the forums, just kept getting invalid messages and a warning of lockout. After frustrating the eternally patient support team, they sent me a little reminder that i should ensure that my 'username' is correct when logging in.
A small and some would think unrequired reminder, unless you were me of course who was attempting to log in with his email!!!
Thanks to the team, i am in, as is evident by this post and thank you for your patience.