Extract from Tesco Clubcard website:
"Make your vouchers go further with Virgin Atlantic Flying Club special offer: From 28th July to 5th September 2014, for every £2.50 of Clubcard vouchers you exchange, you get 625 Virgin Atlantic Flying Club miles + 20% bonus miles. If you decide to opt-in during this time, you will get extra 1,000 bonus miles."
"Make your vouchers go further with Virgin Atlantic Flying Club special offer: From 28th July to 5th September 2014, for every £2.50 of Clubcard vouchers you exchange, you get 625 Virgin Atlantic Flying Club miles + 20% bonus miles. If you decide to opt-in during this time, you will get extra 1,000 bonus miles."