[JAS84]

I’m not convinced that it’ll be every episode of the classic series on there. The way that the  BBC press release describes it suggests that the “800 episodes of Doctor Who programming” includes Sarah Jane, Torchwood, Class & Confidential.

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There's 97 missing episodes. Let's do the maths shall we? There's 830 episodes total (classic and revival combined up to Power of the Doctor). Minus those missing 97 is 733. 

Sarah Jane Adventures is 53 episodes. Torchwood is 41 episodes. Class is eight episodes. Total of 102. Which makes 835.

So the "over 800" claim is accurate, with nothing missing that exists.