Digressing from the subject somewhat I must agree with the general concesus of this thread that we 'Brits' are quite poor when it comes to writing our own language.
I think this also shows in our general inability to learn other languages which cannot be done unless we are able to use our own correctly.
How many native English speakers on forum understand for example the terms 'third person plural', 'Past participle' etc etc. I actually did my English 'A' level at the age of 38 so I could learn these as I was struggling to learn French as I did not know the basic terms and there meanings.
For example I was asked to produce an essay in the third person but to my shame didn't know what the tutor was talking about.
Now these are not so important for verbal communication but it is essential to know these for the written word.