reporter: dorota darnell started off helping polish citizens with their residency applications, afterighting her own way through the british bureaucratic jungle. but now she also accompanies them to the police station when they've been threatened simply for being foreigners. the video surveillance is yet another case of xenophobia. agneszka: she's done it to intimidate us, to show she's in control. she's installed all those cameras, whether they're recording or not. what matters is that she's intimidating us on social media and also in person. she screams out, "i can see you all the time." reporter: agneszka and her family have been living here for four years. their british neighbors moved in two years ago. the threats began with the brexit referendum in 2016. and they didn't just come from one neighbor. agneszka: i'd never had a problem with doctors or at school. now the children get called names. we all know kids just repeat what they hear their parents say at home. i'm afraid to speak polish on the street, because we'll be told off. reporter: one police officer suggested she could