The flights are being organised by travel management company CTM which says the following about the Delhi flights.
“CTM is working on the authorisation of the Foreign & Commonwealth Office to help as many UK-resident British Nationals as possible to return home from Delhi.
“If you are a British National who normally resides in the UK and currently visiting Delhi, and you wish to return the UK, please use this online form to provide your details.
“Special return flights have been arranged for Thurday, 9th April. If you complete this registration, you should have your bags packed and be prepared to depart Delhi by the afternoon of Wednesday, 8th April.
“Please note that registration does not guarantee a place on a flight. You will be sent further information if you are allocated a flight. Those who are not allocated a place on a flight will be put on a waitlist for the next available set of flights.
“These flights are offered to UK travellers who normally reside in the UK and their direct dependants (spouses and children, regardless of nationality, only). Anyone found not eligible to fly will be denied boarding and we reserve the right to deduct an administration fee before offering any refund.
“Please begin by selecting the number of travellers for whom you are registering and then proceed by completing individual registrations for each traveller. The cost of the flight is £581.00 for each traveller and infants, under the age of 2, will travel free of charge.”
The cost of flights from Goa is £681.00 and from Mumbai £600.