Not valid in conjunction with any other offer. One voucher per in-restaurant transaction. One free single Whopper per registered app user in-restaurant when you eat in or takeaway. No added cheese or bacon. Offer valid from 6.00am 17/04/19 subject to restaurant opening hours until 4.00am 18/04/19 subject to restaurant closing hours. Vouchers may not be transferred or made available by you to others. If ordering through Deliveroo, one free Whopper will be added to your basket when you make an order worth a minimum of £5. Limited to one free Whopper per Deliveroo account. Valid only in the UK. Not exchangeable for cash. Valid at participating restaurants only while stocks last. Voucher valid at manager's discretion. Manager's decision is final. Not valid at Burger King motorway service locations, airports, train stations and holiday parks.