Re: 'Blue' and 'Red' Route to Wembley Confirmed
try your luck, this is taken from a coppers' forum
Transport Act 1980 - Law relating to Football Excursions
The Traffic Commissioners have powers to attach conditions to public service vehicle licences
restricting the carriage of drink on football excursions. British Rail introduced a bye-law to
prohibit the carriage and consumption of drink on specified trains.
The Sporting Events (Control of Alcohol etc) Act 1985
prohibits the possession of alcohol on the way to matches on football special coaches
and trains and makes it an offence to be drunk on them
makes an offence of trying to enter a ground when drunk or in possession of alcohol; of
possessing or consuming alcohol within view of the pitch during the period of the
match; or being drunk during the period of the match
provides the police the power to search someone reasonably suspected of committing
an offence under the Act, and to arrest such a person: this may include searching
coaches or trains carrying passengers to or from matches
I even formatted it nicely for you
I believe this relates to specific services laid on for sporting events, so won't necessarily cover all transport. Whilst getting the normal 3:45 train to Waterloo to see a match may be a routine service, it will no doubt be in the Ts and Cs as to what is and isn't permissable, and I am sure they'll have the caveat (same as National Express etc) that they can request anyone not to drink on their service. If you plan on drinking too much, then I am sure BTP will have no problems with arresting for drunk in a public place or utilising one of their bye laws to ruin your day.
That kinda answers your coach question also, if they request you don't drink on that service then they're within their right to prevent you from travelling or terminating your journey at a safe and convenient spot should they wish to. This is not limited to sporting events.