I can't make out the first 3 syllables, but he is saying "... High St coming up here". (The dots are the three syllables". He means "we are arriving at ... High St". The driver is a Londoner. By the way, your question should be "What does the driver say", not "What does say the driver".

I agree with Richard - it's not very clear, but it could be, "Right, Stratford High St coming up here".

Wow, I must be real deaf cause I'm hearing "Must 'ave a right streak comin' up 'ere" Then again, my hearing is bad. I guess you two are more accurate than me! It'd be easier if the whole cab scene or parts before the line were available then it'd be easier to just use logic to figure out what would be more suitable for what he's saying.