It'll be development:phase. I'm in the process of updating "my" developments but there's so many it's taking a bit of time.

No idea. It was five years ago. Best way would be to download that area in JOSM, run the validator on it and see what it throws up. Or see what Keep Right throws up on that area.

How sure are you of these street names? A signed Crispin Close exists off of Egremont Road to the north-east. Also unusual for the turning head at the end of a cul-de-sac to have a different name to the main street section.