To be honest, if Shapps knew this was coming, he'd have got absolutely slated if he'd changed his plans last minute based on that inside knowledge, so, while there are lots of reasons to slate the government in general, and Shapps in particular, I don't think this is one of them.
He also knew he could work from home easily enough on return, which is an option many, including your daughter ( if I remember rightly, she's a doctor ? ) don't have, which makes it easier for him.
Principally China and Lombardy / North Italy if I remember rightly, with North Italy being the end of Feb and, specifically, Wuhan at the end of Jan ? The lack of checks that people were isolating, then and now, is an issue, but isn't a reason not to tell people to isolate.
Not much really, unless you're sat very close to someone infected on a plane, the filtration systems will protect you. I'd be more concerned about getting infected at the airports either end than on the plane itself on a 2 to 4 hour hop to Europe.