I would say the biggest advantage of a Ltd company is that company owners aren't required to pay their company’s debts beyond the value of their shares. Also, it offers a very tax-efficient methods to take money of the company. This is why you probably need to go to a company formation agent. They will be able to advise you on this matter. Try sending an email to these guys - https://www.formationsfactory.co.uk
You should be aware that there is no obligation for limited companies to have a business bank account. However, it is usually a good idea to have one.
Furthermore, you don't need to be a UK resident to open a business bank account but most banks will not deal with you due to higher costs and fraud concerns.
P.S. your company does not require a UK-based bank account. You can open a business bank account in your country in the name of your LTD company in the UK. You will need to have your company documents (Certificate of Incorporation and Memorandum & Articles of Association) apostilled.
This is a great tutorial. However, the article should mention that it is almost impossible to open a business bank account if you don't live in the UK.