NEW Territories taxi operators will today demand fare rises of 25 per cent, plus a $1 fuel surcharge pending approval of the Ten unions representing 2,400, or 88 per cent of, New Territories taxis hope the temporary surcharge will boost drivers' income by about $30 a day. Spokesman Mr Hui Kwun-wah said diesel prices had increased by 15 per cent to $5.50 a litre since fares were last raised on January 31, 1992. The group wants the Government to sanction a minimum charge increase of $2 to $10 for the first two kilometres. Subsequent fares are proposed to increase by 20 cents to $1 for every 200 metres and the waiting time charge by 20 cents to $1 for every minute. The demands are to go to the Transport Department.