I would always advise waiting a year after applying and being unsuccessful to try again - primarily so that you can build your interview skills and have a much better chance at the second shot. While some people talk about a ‘ban’ there isn’t a literal ban in place, it is just seriously taken into consideration when interview invites are sent.
As a year will have passed and you’re looking at a different office enough has changed in your life that your application will be considered fresh. That being said, make yourself known to the recruiting team in London and tell them how much you‘ve grown since you interviewed in India. And then I’d recommend working on your casing and PEI so that you’re ready to go at interview time!
Good luck! And let me know if you need any support.