Since when was Luton local to Birmingham?
You can't really compare the coach service. While there are indeed some coaches running from Birmingham to Wolverhampton and vice versa, you can hardly turn up and go. #
They are significantly more expensive than the buses and trains are in the day, and without booking a seat in advance I wouldn't rely on there being one available as I've been on them in the past and they've mostly been fully booked.
They're also no good after a night out - NX are unlikely to carry you if they think you're drunk (the other passengers might not be best pleased either especially if they've been trying to sleep since London or one of its airports).
Apologies, for Luton, read Coventy. I was tired.
I've regularly caught NX services after a night out. I've had no problem after a few drinks - I suspect it depends if you're lairy or look ill.
Services to Coventry are not as good as they used to be but the 0001 service is £3.80.
Prices of 7 or 8 pounds to Wolverhampton may not compare well with day services but probably do with taxis unless there's a big group of you.
I got used to planning my nights out carefully to enable me to go out every Friday and Saturday when I was on a very low wage - including trips to other parts of the country to see bands, coming back after the band or a later club night. I know some people just burn whatever money they have.
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The fact is, I doubt Birmingham could sustain the operation of a good frequency night-bus route to satisfy the demands of students.
Which seems odd given how many night buses there are in Nottingham and Derby - though these were helped by a time when taxis were scarce and you could be longer queuing for one of those than just randomly going to a bus stop and waiting for a bus on a Friday or Saturday night.
Though half-hourly is low frequency by London bus definitions, many people would regard that as the minimum standard for catching a bus when they didn't know the times it ran. In Central London many nights parallel one another so it's possible to have a much higher effective frequency (I was going from St Pauls to Stratford around 0300 last Thursday night - there were 5 buses due in the 20 minutes after I arrived).
And of course London no longer has the premium night fares that used to put me off them in the 90s.