The UK has sent about £2.3bn of 'aid' to India since 2016 (more in fact as these figures only go up to 2021).
link to independent report
"The Chandrayaan-3 cost was sent to the Moon at a cost of about 6.15 billion rupees, or $75 million, according to Reuters. That is less than the cost of most blockbuster space films."
https://www.independent.co.uk/space/chandrayaan-3-budget-moon-landing-interstellar-b2398483.html
So the amount of 'aid' sent from the UK could actually cover the cost of something like 30+ Indian moon missions.
Not that we can link the 'aid' to the moon mission. I'm sure the 'aid' money was spent on deserving projects, and the government used entirely their own tax payers money for the moon mission.