My original response to Andrew's use of "alternate" was tongue-in-cheek but, a serious point had to be made. All too frequently we - well, some of us but not I - take on Americanisms because we're either lazy or think it cool to adopt such affectations.
Whist I cannot be 100% correct - we all make typos and have lapses - I base my use of proper English on the teachings of my former EHGS headmaster, one Dr Joseph Lacey Whitely (the boot or Joe to his pupils), who was a world-renowned author of readers - for students of both English and Latin: I feel his grasp of the language was more certain than the idiot Webster or any other trendy American corrupter of the English we know and love.
I believe "innit" might be appropriate to close with!
ps The video on YouTube that was recommended to me pretty much says it all.