Welsh couple had a run of three Lucky Lottery wins in one week, ending in a £2.5 million jackpot.First, deputy headteacher Jenny Cooper won £10 and used it to buy Lucky Dip lottery lines and scratchcards.One of the scratchcards won her another pound which she used to buy one more lucky dip Lotto ticket.And that ticket landed them a lottery jackpot of £2,470,696, reports the Mirror.Jenny, 49,