When called back by ATC they were 37nm from Lucknow....and they landed with 200kg of fuel.
They were 58nm from Allahabad so extrapolating would have landed with....well fair to say would never have gotten to make the approach.
Immediately on making the G/A they went from MIN FUEL - which means nothing, just advice with NO NEED for ATC to assist/improve track miles - to MAYDAY FUEL so WILL be landing with less than 30 min of fuel total remaining.
The decision is made to divert using that 30 min total remaining fuel just to try and get to the "new" alternate let alone having to burn more fuel when configuring for an approach.
They would have been lucky to get near the airport before flaming out, unimaginable they would have any remaining fuel once configured.
In making their decision they decide to track away from an airport equipped with an ILS to another airport with uncertain weather (as shown already metars can change rapidly in India).
Suspects this will be an incident for discussion in CRM/Command Initiative courses for a long time to come.