Need Advice on Christmas Gift- London Gin

I am involved in a Secret Santa proceeding with some coworkers and colleagues secondary to an upcoming holiday party, and I am told that the person for whom I am Secret Santa has a deep admiration for "London Gin." I did some research and London Gin is apparently any Gin that is very dry. I don't know much about Gin, because my own spirits of choice are Rum and Bourbon.

Can anyone recommend a good London Gin? Are they made with infusions, like the proliferation of Vodkas that are infused with basically everything you can think of except Grandma's armpit sweat?

Is there any new and trendy London Gin?

What differentiates a good London Gin from its peers?

Thanks in advance for any astute insights,

EB

Thanks for all the tips. I went to a very large local Wine & Spirit retailer and their Gin consultant recommended 2 different London Gins. I ended up buying this one which was $23.99 (US$) for the bottle:

http://s19.postimg.org/fw08rbjb7/image.jpg

Note the bowler hat on the top of the bottle.