Faryal Velmi from Transport For All says the ramps help unlock the capital for many people in wheelchairs.
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Negotiators from London Underground and three unions are meeting at the Euston offices of the concilliation service ACAS.
Clear periods and light winds tonight. Staying warm and muggy. Lows of 17°C.
It took police six days to launch a murder investigation after notorious British criminal John 'Goldfinger' Palmer was shot dead.