BURGLARS raided Downtown in Gonerby Moor three times in two weeks over the Christmas and New Year periods.
In December the thieves stole electrical items and gardening equipment from the superstore and a police helicopter was scrambled following the third attempted break-in on Tuesday, January 4.
The initial robberies were made on Tuesday, December 21 and Tuesday, December 28.
Police are appealing for anyone with information to get in touch. Officers are particularly looking for anyone who may have seen three men acting suspiciously in the Downtown and A1 services area at Gonerby Moor between 9pm and 11pm or who have seen a silver Renault Megane in the area around that time.
Anyone with any information should contact Grantham Police Station, quoting the incident number, via 0300 111 0300 or call Crimestoppers anonymously on 0800 555 111.