Add history/source links to detailed guidance template
Add "Choosing appropriate formats"

After some discussion on govuk-dev about publication formats, I said I'd attempt
to draft something for the service manual. This is very rough and ready, but
hopefully better than nothing.
capitalization, typo
remove dead link
use terminology consistent with page title
typos
add link in again, with correct link this time
remove one more usage of "sub domain"
"development and testing environments" is a better link description
Linking from "development and testing" does not make sense - someone using assistive technology might ask "development and testing of what?". It makes more sense to link from the full phrase "development and testing environments" as that adequately describes the content of the link referred to.
Make the link about robots.txt explanatory
GDS -> Government Digital Service
grammar
service owner -> service manager
Minor typos and grammar fixes on prototyping page
A link for Continuous Integration

I've suggested we link to Jenkins but it might be better to link to an explanation of Continuous Integration?
Procurement shouldn't be capitalised
This sentence didn't quite make sense

The meanings of what? What I've suggested may not be quite right, but the sentence needs something to make more sense.
Correcting literal

...almost a literal. Depending on your accent.
Typos on hosting page
Lockin isn't a word

It might be better to restructure this sentence thusly: '...simpler procurement rules, it's possible to lock yourself into a provider with simple technical intertia.'