The increased bill has been out down to the discovery of asbestos pollution and World War Two damage in the Elizabeth Tower.
The outgoing MEP said the decision by Commons officials to rule out chiming Big Ben showed the government was "embarrassed" by Brexit.
The fundraising page for Big Ben to chime on January 31 has reached 20 per cent of its target in less than 24 hours.
Police are not treating the incident as terror-related and there were no weapons recovered.
Next week the chimes of Big Ben will sound for the last time as maintenance work begins