Following the announcement that seven government departments have provisionally agreed to reduce their budgets by up to 10%, underground and business leaders are urging the Chancellor not cut funding for major tube projects.
They say schemes like the planned £250 million makeover of Holborn station are vital.
Holborn serves the 'midtown' business district but is closed several times during rush hour because it can't cope with its 100,000 passengers a day.
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The track will be demolished to make way for a housing development and a new Stadium for AFC Wimbledon.
Just four authorities (Hammersmith & Fulham, Hillingdon, Newham and the City of London) have chosen to freeze council tax altogether.
Kurt Cochran and his wife Melissa had been visiting London from the US to celebrate their 25th wedding anniversary and were due to fly home.