Police are advising drivers to remain vigilant after two incidents of theft recently in the Grantham area. Both took place when the drivers had been shopping at supermarkets and were in the process of returning their shopping trolley. On the first occasion a purse was stolen from the front seat of the vehicle and later the same day a handbag was taken from an unlocked boot. PLEASE LOCK YOUR VEHICLE AT ALL TIMES WHEN UNATTENDED (EVEN FOR A SHORT TIME) AND KEEP ANY ITEMS OF VALUE OUT OF SIGHT