Couldn't find sensible results for london sky line egg? You might be looking for information on The Gherkin (official name of 30 St Mary Axe), which is a slightly egg-shaped building in London. As its name suggests, though, it's actually shaped a lot more like a pickled cucumber (although a pine cone is probably the best approximation mother nature has to offer).
Or you might mean City Hall, aka The Mayor's office.
I feel sorry for whoever typed london sky line egg into Google.
Other people have done it before, with variations such as 'Liverpool Street Egg'. It seems they're looking for information about that egg shaped building on the London skyline.
I've never seen an egg shaped building on the London skyline, so I presume they mean The Gherkin, aka 30 St Mary Axe. So I've performed the public service above of linking to some comprehensive information about it. Here also are my posts tagged with Gherkin.