By Tom Balmforth and Stefaniia Bern KYIV (Reuters) – In Nova Kakhovka, a city in southern Ukraine occupied by Russian troops five months ago on the first day of its invasion, the signs of creeping annexation by Russia are mounting and some residents fear a return to Soviet times. A statue of Russian Communist leader Vladimir Lenin, erected in April, stands in the city centre, where the Russian and Soviet flags have been hoisted. On the side of police cars patrolling the streets, the Ukrainian word “politsiya” has been repainted in Russian. Some shops accept the Russian currency, the rouble, as…