A full-scale political battle has broken out between the BJP-led Centre and the Trinamool Congress-led West Bengal government, sparked off by the “unannounced” landing of a central team of officials in Kolkata on Monday morning.A full-scale political battle has broken out between the BJP-led Centre and the Trinamool Congress-led West Bengal government, sparked off by the “unannounced” landing of a central team of officials in Kolkata on Monday morning.