Rakesh Asthana, the CBI's number two officer who has been accused of accepting bribe by his boss Alok Verma, has pointed out that he was in London during the entire period when the alleged negotiation with a Hyderabad-based businessman and the exchange of money through middlemen took place, NDTV has learnt. Mr Asthana has also dismissed the claim that the middleman met him at his office Delhi around the same time.