On the 26th of August, 1993, an A320 was commencing take-off from Gatwick, UK. When the aircraft was lifting off, an uncommanded roll to the right occurred. The co-pilot, who was the Pilot Flying, at first attributed this to cross-wind, and applied left stick. When full left stick did not contain the roll, he assumed his side stick was faulty and handed control to the commander, who immediately found that he too needed full left stick to keep the wings level. As the aircraft passed 1,700 feet the ECAM system sounded a repetitive chime and displayed on its upper screen the messages F/CT L ALTN LAW and F/CTL SPLR FAULT, indicating a significant fault which had caused the Electrical Flight Control System to go into "alternate law" and that the fault involved the spoilers. Roll control improved slightly after flap retraction.