Monday's attack on Muslim worshippers in London is adding to the pressure on Prime Minister Theresa May. Her government is facing accusations that its security failures played a role in the terror acts in the capital... and Manchester.<br /><br />In this latest incident near Finsbury Park mosque, a van drove into a crowd of pedestrians, after Ramadan prayers had just finished. RT's Polly Boiko looks at how Britain has found itself seemingly vulnerable to extremism.<br /><br />RT LIVE http://rt.com/on-air<br /><br />Subscribe to RT! http://www.youtube.com/subscription_center?add_user=RussiaToday<br /><br />Like us on Facebook http://www.facebook.com/RTnews<br />Follow us on Twitter http://twitter.com/RT_com<br />Follow us on Instagram http://instagram.com/rt<br />Follow us on Google+ http://plus.google.com/+RT<br />Listen to us on Soundcloud: https://soundcloud.com/rttv<br /><br />RT (Russia Today) is a global news network broadcasting from Moscow and Washington studios. RT is the first news channel to break the 1 billion YouTube views benchmark.