The London Insider is quite a unique blog, more of an online magazine than a true blog. A blog, for one thing, normally has one or two writers. But The London Insider has a group of writers, coming out with articles about a wide range of topics, with an emphasis on food, dining out, and the arts & culture in London. Not much coverage of nightlife, but I guess there's usually not many things to write about that!
What I found particularly interesting with The London Insider is that it has really detailed articles and reviews, and unlike many of the blogs out there, doesn't copy and paste press releases or content from another source. Plus most of the articles are on plays, theatre, restaurants, issues, and events that are somewhat smaller and off the beaten path, so there's alot of "hidden gems" and "secrets discovered" type of moment with The London Insider, rather than just another blog rehashing a big news article that has been published everywhere.
The London Insider isn't for everyone, but give it a go for the free 14 day trial, and see if you like its quirkiness and off-beat style!