Can I do LLM starting from 27th September 2020 and what are the requirements for that in UK/Germany for a LLB?

No, you cannot start an LLM from September 27, 2020, as that date has already passed.

For future LLM intakes in the UK or Germany, you typically need:
- Bachelor’s degree in Law (LLB): You have this, but most UK and German universities require a higher aggregate than 59%. Some may consider lower grades with strong supporting experience. - English proficiency: Usually proven by IELTS or equivalent, unless exempt. - Application deadlines: Vary by university and are subject to change each year.

With your current profile, you may find eligibility challenging at many universities.