From UK articlelink
The matter is serious enough to merit Congressional hearings in Washington as well as parliamentary hearings in London. It is easy to see why the Obama team refused to allow the US Senate access to the negotiating documents for New START, as they would have sparked outrage on both sides of the Atlantic that would almost certainly have killed the Treaty.
The Telegraph report clearly contradicts repeated claims by the Obama negotiating team that no side deals were struck with their Russian counterparts.
Thank you very much.
IIRC, there were no photographers or reporters allowed when he signed the START treaty.