I noticed a classic 'standard English' error in David Cameron's speech at the Conservative Party conference recently. He said:
'Let me tell you about Michael Gove and I'
I decided to check the transcript and found it online here:
The phrase above had been removed. You can hear it though, around 25 seconds into the video. Not sure whether that reflects a spontaneous change he made while talking or whether someone thought they should tidy it up. I found a comment on it here (from 'PorFavor' who described it as 'appalling grammar').
I don't think Cameron should be embarrassed. This is a common error made by standard English speakers. Interestingly, it seems to be a case of 'hypercorrection', where someone 'over-corrects' themselves when speaking in a variety they're not comfortable with (e.g. Spanish speakers adding /h/ before vowels to compensate for the 'absence' of /h/ in Spanish).
Of course, this raises the question of why standard English speakers 'hyper-correct' when using their own first language, leading some linguists, such as Nick Sobin, to the conclusion that 'Prestige English is not a natural language'