Can I go to London without IELTS for studying? 

It depends on the requirements of the specific educational institution or program you wish to apply for in London. Some universities and colleges may require proof of English proficiency, which can often be demonstrated through the IELTS exam.

However, there are some institutions that may accept alternative forms of English language proficiency proof, such as the Test of English as a Foreign Language (TOEFL) or the Pearson Test of English (PTE). 

Some universities may also offer pre-sessional English language courses to students who need to improve their language skills before beginning their studies.

It's best to check with the institution you're interested in to see what their specific language proficiency requirements are for admission or you can check with your preferred study abroad consultant. 

Keep in mind that even if an institution does not require the IELTS, they may still require some form of English language proficiency testing or proof such as MOI (Medium of Instruction) letter. For instance, University of Roehampton, University of Greenwich, University of West London, Middlesex University London, and University of East London may offer IELTS waiver for a few courses.