document: The sum is half the record Lotto jackpot win - shared with a couple from Hawick who claimed their prize within days of the 9 January draw.
  A spokesman for organisers Camelot urged players to "check, double-check and triple-check" their tickets.
  The ticket had the winning numbers 26, 27, 46, 47, 52 and 58.
  Updates on this story and more from Worcestershire
  Camelot said the exact location where the ticket was purchased could not be revealed but it hoped that by naming the area where the ticket was bought it could increase local interest and help find the winner.
  The area has not been narrowed down further to preserve the winner's anonymity, they said.
  It is not known if the winning ticket was bought by an individual or a syndicate.
  David and Carol Martin, both aged 54, received a cheque for £33,035,323 after claiming their share of the record jackpot, that occurred after 14 successive rollovers.
  Even though the prize total was shared, the sum is still the biggest win since the National Lottery was launched in November 1994.
  However, the sum is dwarfed by the the biggest UK win in the Euromillions lottery, a draw where prize money comes from ticket sales in several European countries.
  Colin and Chris Weir, from Largs in North Ayrshire, collected £161.6m in 2011.
summary: An unclaimed National Lottery jackpot winning ticket that could earn the winner £33m was bought in the Worcester area, it has been revealed.