The Institute of Chartered Accountants in England and Wales (ICAEW) said there was already international co-operation to tackle taxavoidance through the Organisation for Economic Co-operation and Development.
After the four-hour summit, Mr Cameron will travel to Paris to meet French President Francois Hollande at the Elysee Palace where co-operation on tax evasion and avoidance as well as tackling corporate secrecy will again be on the agenda.