Based on http://www.walesonline.co.uk/business/business-news/gallery/culverhouse-cross-9059475 that campus no longer exists, Royalmail also deleted the postcode. (source https://github.com/ideal-postcodes/postcodes.io/issues/90)

Does purple-store still exist? On the website they only list locations in Paris

Hier entsteht https://05elf.com/ aber derzeit noch Baustelle

Satellite imagery show no streets here.

Website of business is offline. Does the business still exist?

https://www.wcdealers.com doesn't list this branch. Did they close this location or move?

Does 'Club femme' still exist? The website doesn't work

This building has two house numbers (two address nodes) while the building north and south have no house number.

Building has two house numbers (two address nodes)

There is a node node/9371835093 with house number and street in the middle of the lake.