Conversation so far:
is a marriage in canada legal in the uk
Your marriage will be recognised in the UK if you followed the correct procedures in the country where you got married and the marriage would be allowed under UK law.
is a marriage in the us legal in the UK
Your marriage will be recognised in the UK if you followed the correct procedures in the country where you got married and the marriage would be allowed under UK law.

Question: and in India
Self-contained rewrite: is a marriage in india legal in the uk