That journey would take roughly an hour by train, and you would arrive at London Euston station.
About an hour - Google maps states 57 minutes but if you travel during rush hour, this will be much longer.
London to Leicester takes about 1 hour 15 minutes.
Maidstone to Leicester would take about 2 hours 30 minutes.
About two hours.
23 hours
Take the distance and divide by the speed of the train. That is how long it took for the train to travel.
about 3 hours by train
According to Traveline, between 4 hours 30 minutes and 4 hours 45 minutes, with two changes of train.
About six hours by car. If you intend to walk, it will take considerably longer.
It depends where in Leicester you are.
Is this a trick question? It takes a train an hour and a half to travel an hour and a half.
You can't travel directly from Heathrow to Bristol. The best way is probably to take a bus to Reading and get a train from there or travel into Central London and get a train there.