the brolly-clad thieves targeted supermarkets , convenience stores and electrical shops , swiping £ 2,000 worth of cigarettes and cars valued at £ 30,000 in the process .
cctv footage from one of the raids in tipton , west midlands , shows the gang using umbrellas to conceal their entrance as they burst into a supermarket , where they stole cash from the offices .
detectives then used forensic evidence found on the weapon to link the various burglaries , before executing search warrants on the homes of the four suspects .