70. A method as claimed in claim 45 , comprising storing the portions of code in a buffer memory for subsequent transmission to the user device.
70. A method as claimed in claim 45 , comprising storing the portions of code in a buffer memory for subsequent transmission to the user device. 71. A method as claimed in claim 70 , comprising storing in a session memory client data received in successive messages from the user device in response to successive transmissions of the respective portions of code representing portions of the page, and combining as a single data object client data for a completed session in which client data is received responsive to all of the portions of the page.