Cheapest way stay/travel in UK from India [closed]

You need a standard visitor visa https://www.gov.uk/standard-visitor-visa There is no defined amount for savings, you just have to be able to show a stable income with a surplus of income over expenditure and that the amount you’re proposing to spend on the trip is credible eg you’re not spending your entire life savings. There are a lot of questions about U.K. visas on this site, search ‘visa refusals’ to see the pitfalls. In the U.K. a cheap accommodation option is AirBnB, however most hosts look for someone with an established profile / good reviews on the site, youth hostels are another option https://www.tripadvisor.co.uk/HotelsList-England-Youth-Hostels-zfp12073328.html Travel by bus is generally cheaper than trains but takes longer https://www.checkmybus.co.uk/

You can buy a Oyster card at the airport and use it for daily bus/train travel. You might know that London is divided into various zonal area. You can travel to any zone with a Daily Cap limit. I would suggest you to plan your all tourist activities as per zonal area to minimise your bus/train fares on each day. Because a single trip to zone 1 to 6 would increase the daily cap limit to £12.50. You can choose for backpack hostels as the cheapest accommodation option where you will also have the facility of cooking in hostel kitchens. Others option would be hotels/airbnb in non-prime zones which are comparatively cheaper than zone 1/2.

General rule for London:- you will be able to get discount on ticket price if you book it online and carry the print of it. In my experience, the ticket counter prices are always £1-3 more expensive than online price.