These and other works completed by 2007 were expected to boost rush-hour capacity by 25% and line capability by 12% at a cost of tens of millions of pounds.
Disse og andre arbejder var fuldendt i 2007 og forventedes at forøge kapaciteten i myldretiden med 25 % og banens ydeevne med 12 % for et to-cifret millionbeløb (i britiske pund).