Can the UK afford to impose financial sanctions on Russia, and how will they play into Russia's presidential election this weekend? Manuela Saragosa visits Eaton Square in London - known as "Red Square" because of the number of Russian billionaire oligarchs alleged to own properties there, according to journalist Mark Hollingsworth. She also hears from Russian journalist Sergey Strokan, Dr Samuel Greene of the Russia Institute at King's College London, and Philip Worman of political risk consultancy GPW. (Picture: Russian Passport and roll of US dollar banknotes; Credit: Scull2/Getty Images)