New site links?

[SwanseaMedicine]

Hi all,

Don't know whether this is new, or whether I'm very unobservant and just noticed, but certain results in the SERPs have started listing site links, more akin to Ads.

So, if you google 'Department Stores London', you'll see the top listing 'Visit London' has four sitelinks underneath for Selfridges, Debenhams, Harrods and Fenwick. Is this markup?

My website has sitelinks if you search for us, but if we appear in a generic list (like this search), then they disappear. Any ideas?

Cheers,

Rhys