Eurolines takes 4 hours. By car on a calm moment you can do it in 3 hours.
You better take the high speed train Thalys, it is only 1h22.
It depends on where the bus ride began.
How is the ride
45mintues
Eurostar is the brand name of the company running high speed trains London-Paris and London-Lille-Brussels through the Channel Tunnel.Eurostar uses the stations: St. Pancras (London), Gare du Nord (Paris), Bruxelles Midi (Brussels) and Lille Europe.
4 hours
Eurostar is a train, not a bus. Eurostar is the brand name of the company running high speed trains London-Paris and London-Lille-Brussels through the Channel Tunnel. Eurostar uses the stations: St. Pancras (London), Gare du Nord (Paris), Bruxelles Midi (Brussels) and Lille Europe. Currently these are the only passenger trains operating through the tunnel. The Eurostar takes 2 hours 15 minutes between London and Paris.
30 minutes to 2 hrs depending on the choice you make There is a direct fast train The bus will take a couple hours.
About two hours
About 10 hours
travel by bus from London to Aberdeen it takes 364 days
London is a great place to find a double decker bus. It was one the common ways to get around. Many other places have double decker buses, but London is the most popular one.
Strictly speaking, you would ride "in the bus" because to be "on the bus" would mean that you are on the roof. However, people often say that they ride on the bus when they mean that they are sitting or standing inside it.