Hi There
The Apple one is obvious. The created their own App and is for sale in the Itunes store.
I didnt see the other two in OSE after scrolling for a few pages in the linking domains.
VERY unlikely a company like Anglian would use, or a SEO agency that uses, these techniques as it's way to risky. They are a well known brand, have a good modern website and a strong link profile.
The list of top domains is there thanks to OSE but do take a look at Majestic SEO as well to unearth far more.
Good luck. We have a potential client who sells conservatories and sealed units so no doubt we will be up against them soon too!