By Bansari Mayur Kamdar (Reuters) -UK’s FTSE 100 rebounded on Friday as Western sanctions against Russia over its invasion of Ukraine were not as severe as investors had expected, but the blue-chip index recorded its second consecutive weekly decline. Banks and insurers rose 5.4% and 5.3%, respectively, leading the benchmark FTSE 100 3.9% higher. It had slumped nearly 4% on Thursday. While Western nations hit Russia with new sanctions including freezing bank assets and cutting off state-owned enterprises, they stopped short of disconnecting it from the SWIFT international banking system or tar…