At London (Heathrow), there's the Direct Airside Transit Visa (DATV). “If you're transiting London you need DATV. But if you're travelling, say, to the US, there are exemptions. Those with a valid US, Canadian, Australian, Japanese visa can travel to any country via London without DATV.
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Check if you need a transit visa to connect through the UK - even if you're only connecting from one flight to another, you may need a transit visa, such as a Direct Airside Transit (DATV) visa or a Visitor in Transit visa, to connect through the UK.
Note that if your connecting flight is to another Schengen area country, you don't need a transit visa. Instead, you will need a regular short-stay Schengen visa for the Netherlands. This also applies if you need to transit through another airport within the Schengen Area, other than a Dutch one.
Indian nationals usually do not need an airport transit visa to change planes in The Netherlands. The Visa Advisor helps you determine whether you require a visa.
An airport transit visa is generally required if you travel internationally and if you need to transit through a country. Even if you do not intend to leave the airport, you may need an airport transit visa.
With effect from 27 April 2021, all Indian nationals in transit through the international zone of a French airport on their way to another country will require an airport transit visa (ATV). The following categories are exempt from this visa (ATV):
Currently, only four EU/Schengen countries require Indian passport holders to obtain a Transit Schengen Visa in order to transit their territory, and these are France, Germany, Spain and the Czech Republic. Indian nationals can, however, transit through other Schengen Area countries, including here in the Netherlands.
Indian passport holders are not obliged to hold an Airport Transit Visa. Hence, transit through Switzerland and stay at the airport international transit area is permitted without any visa. Please note that Switzerland Tourism has no authority related to granting or declining a visa.
You cannot travel to the UK with just a Schengen. The UK is not a part of the Schengen and will soon not be a part of the EU as well. As a result, they have an independent visa regime. If you want to enter the UK, you will need a UK visa.
We recommend that you allow the following minimum connection times: 1 hour for connections within the same Heathrow terminal. 1 hour 30 minutes for connections that require travel between terminals at Heathrow.