This letter from Caroline Pidgeon to Boris Johnson raises concerns about the sponsorship deal for London's cycle hire scheme. It questions the decision to extend the sponsorship contract with Barclays without opening it to competitive bidding. It also asks about the commercial benefits Barclays receives from the deal and requests transparency by publishing the full contract details. Pidgeon seeks answers to 10 questions about the bidding and evaluation process, and asks Johnson to consult Londoners on further expansions of the cycle hire scheme.