If you're planning a trip to the UK from India, there are several travel options available to you. The best way to travel in the UK depends on your budget, travel preferences, and the places you want to visit. Here are some options to consider:

Air travel: Flying is the quickest and most convenient way to travel to the UK from India. There are several airlines that operate direct flights from major cities in India to London, such as Air India, British Airways, Virgin Atlantic, and more. Flights from Mumbai or Delhi to London take around 8-9 hours, while flights from other cities may take longer. You can also consider domestic flights to travel within the UK.

Train travel: Trains are an excellent option to travel around the UK as they offer scenic views and are usually faster than buses. You can book train tickets in advance on the National Rail website, which is the official website of the UK's national rail network. If you're planning to travel frequently by train, it may be worth getting a rail pass that offers unlimited travel on certain routes.

Bus travel: Buses are a cheaper option to travel around the UK, and there are several bus companies that operate intercity routes. You can book bus tickets online on websites such as National Express, which is the largest bus operator in the UK.

Car rental: If you prefer to drive, you can rent a car from one of the many car rental companies in the UK. You'll need to have a valid driver's license, and it's recommended that you purchase insurance as well. Keep in mind that driving in the UK is on the left-hand side of the road, so it may take some getting used to if you're not used to it.

Bicycle: If you enjoy cycling, you can rent a bicycle or bring your own and explore the many bike-friendly cities in the UK, such as Cambridge or Oxford. Several cities also have bike-sharing programs where you can rent a bike for a short period.

When traveling in the UK, it's essential to have proper documentation, such as a valid passport and visa if required. It's also a good idea to carry a copy of your travel itinerary and any necessary medical information. The UK has a robust public transportation system, so you may not need to rent a car or hire a taxi unless you're traveling to remote areas.